3 comments/ 57571 views/ 16 favorites Aliens Use Sex to Invade Humans Ch. 03 By: walterio Author's note: I received an e-mail requesting that I write a story about aliens taking over humans and creating insatiable sexual desires. The person requesting this story had read another story on Literotica entitled Hosts. He was disappointed that the author of Hosts did not write any more chapters after the first submission, which is why he asked me to write about this topic. It is my first venture into this story category so let me know what you think. I will continue with story if the feedback in encouraging. Thank you! INTRODUCTION Four astronauts aboard the international space station are inhabited by alien hosts who use human sexual desires to re-populate their alien presence. The crew is returned to earth and after being briefed by the space agency they all return to their former lives. The alien's continue to use their human hosts to recruit other humans through the exploitation of sex. Chapter 01 -- The International Space Station Chapter 02 -- Astronauts are debriefed and return to duty Chapter 03 -- Rachel returns to her family life Chapter 04 -- Aaron meets his son's roommate Chapter 05 -- Carl visits a gay bath house Chapter 06 -- Sam resumes his private practice Chapter 07 -- The alien population continues to grow using humans as hosts CHAPTER 03 -- RACHEL RETURNS TO HER FAMILY LIFE THE HOMECOMING Rachel arrived home while her husband Ralph was still sat work and her 18 year old son Ricky was in school. Rachel was anxious to see them both since it had been months since she was home. Rachel also had that burning sensation in her pussy and she was anxious to make love with her husband as soon as he got home. She wondered what her husband would think of her new fit body and big firm tits. Rachel assumed that her husband would be anxious to have sex since Rachel had been gone so long. Ralph, however, had not been faithful while his wife was in space. He had started and affair with his secretary and at they very moment she was on her knees in his office sucking his cock. Ralph knew that he would have to cool it now that his astronaut wife was back home but he loved his secretary Betty's blow jobs, so he just had to have one more before he faced his wife. As Ralph was getting his pipes cleaned, his son Ricky was in his car making out with his high school sweet heart Cindy. Ricky had parked down the street from Cindy's house and they were kissing and petting before Cindy went into her house. By the time Cindy got out of the car Ricky was ready to cum in his pants. As he drove home his balls ached and he needed to jerk off as soon as he got in the house. Ricky and Cindy had not had sexual intercourse yet but they talked about it since had just turned 18 years old. They had experimented with mutual masturbation and Ricky loved the way Cindy jerked him off. Cindy also liked having her pussy fingered while Ricky sucked on her breasts. Ricky could hardly wait until they took it to the next step. Ralph and Ricky arrived home about the same time and they were shocked when they saw Rachel. Ralph could not believe how good she looked and her figure was better than ever. Ricky stared at his mom as she had never looked hotter. Then alien inside of Rachel stared through her eyes at the two men and signaled Rachel to kiss them deeply. "It's so good to see you both," Rachel said happily. "It's good to see you too, you look great," Ralph replied. "Yeah mom, you look great," Ricky agreed. Rachel then embraced her husband and kissed him deeply driving her tongue into his mouth and releasing an alien substance into his mouth. Then Rachel turned and embraced her son and French kissed him depositing an alien form into his mouth. Ricky was shocked at his mother's behavior but he shrugged it off thinking that she was just so happy to see him. Ricky then excused himself and went up to his room. All of a sudden he felt very horny and he needed to jerk off. That session with Cindy had a bigger effect on him then he thought. Rachel took Ralph by the hand and led him to their bedroom and within minutes they were naked in bed together. Ralph felt a strange feeling run through his body and his cock ached as it began to stiffen. Ralph stared at his wife's hot body and firm big tits. It looked like she had gotten a boob job but he knew that was not possible. Something must have happened in space that changed her body for the better. "I need you Ralph," Rachel cooed as she opened her legs to welcome him into her. "I missed you baby," Ralph lied thinking about his secretary as he pushed his cock into his wife's pussy. Ralph remembered how his wife only liked to fuck missionary style. She would ride him sometimes or let him fuck her doggy style but she never took it in the ass or sucked his cock. That's what he liked about Betty as she did it all. Of course Ralph had no idea how the time in space had changed his wife but he was about to find out. Rachel had been dying to get a cock in her since the last time with her fellow astronauts. Now finally her husband was in her but she found that she missed the big cocks of her colleagues. Then she felt her husband's cock begin to swell in her pussy and rub against her clit. Ralph drove into her as he felt her pussy tighten around his cock. He never knew that she could be so tight. Ralph had no idea that the alien body had located itself in him and was causing his body to change. The two of them raced toward their orgasms and Ralph felt his ball sac tighten. He drilled his wife and unleashed a torrent of cum in her pussy. He couldn't believe that he could cum that much particularly after cumming in Betty's mouth earlier that day. What was even more remarkable was that he stayed hard and continued to fuck Rachel until she came and flooded her pussy with her female nectar. Ralph's cock was soaking in a pool of co-mingled love juices. Ricky had heard the noise in his parent's bedroom while he was jerking on his cock thinking of his girlfriend Cindy. As the alien form took over Ricky's body it directed Ricky to his parent's bedroom. Ricky stood at their door and watched his parents make love except that it was more raw sex than love. When his dad pulled out of his mother and rolled over on his back, Ricky stared at his father's huge cock. Ricky couldn't believe it as he knew that his father had a smaller cock than that. How could it look so large now? Then Ricky noticed his own cock growing in length and girth to a point where his hand could not wrap around it any longer. Rachel mounted her husband's big dick and lowered her pussy onto it. Then they began to fuck like animals again. Ricky watched his parents fucking and then he decided that he just had to join in. He walked in the bedroom and with the alien's guidance he got on the bed behind his mother. He stared at her asshole as she humped her husband's cock and then Ricky scooped up her juices and rubbed them on his cock. Ricky used his mother's pussy juice to lubricate his cock and then her asshole. Rachel felt her son's finger probe her anus and she looked over her shoulder and spoke, "That's it Ricky get my asshole wet. Get it ready for your cock." Ralph couldn't believe his ears when he heard his wife. She was asking her son to fuck her in the ass. Ricky used his saliva along with her juices to get his cock slippery and then he eased it into her asshole. Rachel groaned with pleasure as the big cock slid into her rectum. Ralph and Ricky could feel each other's cocks through the thin membrane in Rachel's body which was an added turn on for them. The two of them established a rhythm and they skewered Rachel's body. Ricky was the first to cum this time and he flooded his mother's ass with his load. Ricky never in a million years would have thought that he would lose his virginity to his mother. He also would have never expected to fuck any girl in the ass much less his mother. Ricky stayed hard and kept pounding his mother's ass until his dad came again and his mother screamed with another orgasm. The three of them stayed in bed for hours sucking and fucking. They changed positions each time with the husband and son taking turns in Rachel's pussy, mouth and ass. Ralph couldn't believe the display of raw sex from his wife. He was also shocked that his son had taken her ass before he did. Hours later they finally stopped having sex and collapsed on the bed. The three of them lay there contemplating what had happened and how it would change their lives forever. The alien's inside their human hosts were pleased with what they had accomplished and they looked forward to recruiting more human hosts. THE DAY AFTER AT THE OFFICE AND AT SCHOOL The next morning Rachel, Ralph and Ricky fucked like rabbits before Ralph went to work and Ricky went to school. Rachel spent the day resting and recollecting what had happened to her. Before the time of the space station she had been a conservative lover even with Sam her fellow astronaut. Whatever happened that day when Aaron and Carl joined in had changed her forever. It was as if she didn't have any control over her body any longer. She wondered how her fellow astronauts were doing. Betty had been waiting for Ralph to arrive at work. She was sure that he had made love with his wife the night before and she wanted to refresh his memory as to who was the better sex partner. Betty noticed that Ralph had a few trivial meetings that morning so she cleared his calendar. She had worn his favorite outfit, a mini skirt and a tight fitting blouse. Ralph always liked to slide his hand up under her short skirt to squeezed her ass and play with her pussy. When Ralph arrived Betty followed his into his office and closed and locked the door. Then she walked up to him and kissed him. The alien through Ralph's eyes studied the attractive Betty and decided that she would be a good recruit. Betty dropped to her knees and opened Ralph's pants and pulled them to his ankles. The she lowered his undershorts and watched in amazement as his huge 11 inch cock leaped out. "Ralph, what happened? How is this possible?" Betty stammered as she looked at the big cock that had replaced his average size pecker. "I don't know, just blow me," Ralph gasped. Betty stared hungrily at his huge cock and then reached out with her hand to stroke it. She marveled at its size and wondered how she would ever handle it. Ralph sighed as she masturbated him. She leaned forward and her tongue snaked out and lapped at his ball sac lightly, then she gently licked up and down his shaft. Her tongue circled his cock head as she slowly took the head of his penis into her mouth. Her lips slid further down the shaft as she was able to take half of his cock in her mouth drawing a moan from him. Betty began to bob her head back and forth on his cock, sucking hard on his huge member and testing her gag line. She was able to get about seven of his eleven inches in her mouth. Betty slurped loudly on Ralph's dick as her soft lips glided smoothly up and down his long cock. Ralph stood before the shapely Betty as she sucked ravenously on his oversized cock. Her hand cupped his balls and gently caressed them as her tongue licked at the head of his dick each time it came out of her mouth. Ralph placed his hands on the back of her head and guided her as she gave him an incredible blowjob. He loved the way she sucked his cock. She was so hot and he couldn't believe his good fortune as he held her hair back to watch her pretty face and sensuous mouth. Betty kept her eyes closed with her lips snugly wrapped around his shaft as she bobbed back and forth. She was still incredibly turned on and her panties were soaked. Ralph brought new excitement into her life with his renewed big cock and Betty realized that she was addicted to it. She was so enamored with his impressive cock; she found that she loved to suck on it. Betty was desperate to please him and to make him cum. She loved to swallow cum. Betty wanted this to be Ralph's best blow job ever and she put all her efforts into it even more so than she ever had with any other lovers. It did not take long to bring Ralph to the edge. Ralph announced that he was cumming and Betty clamped down on his cock determined to swallow every drop of his seed. She could feel his cock jerk in her hand as volley after volley bounced off the back of her throat. Betty swallowed as quickly as she could and did not allow a drop to escape her mouth. She continued to suck on his cock milking it dry of his sperm. Then Betty took the cock from her mouth and Ralph watched as she squeezed more cum out the end of his dick. Betty then wrapped her lips around it and sucked his man juice dry. She nibbled on his dick head causing him to shiver and he pushed her away. Ralph's cock stayed hard and Betty marveled at the impressive organ before her. Of course Betty had no way of knowing that an alien substance had entered her body and would soon take over. Betty cleaned off the top of the desk and lay on top of it. She pulled up her short displayed her beautiful neatly trimmed pussy to Ralph. She opened her legs and smiled at him. Ralph smiled too as it was clear that she had removed her panties earlier. "Now do you have something for me?" she said as she opened her legs before him hiding nothing and leaving no doubt as to her desire. Ralph stood before Betty at the end of the desk and kissed her from her knee up her soft thighs towards her womanhood. He took in the lovely smell of her as he kissed her smooth creamy white skin just beside her vagina. Betty was in a state of ecstasy and her heart pounded as she watched her boss lick her. Her cunt lips quivered as he teased them with his tongue and kissed her everywhere she desired. Ralph's tongue probed deep into the inner walls of her pussy. Betty ran her hands over her body cupping her breasts and rolling her nipples between her fingertips. It was strange that she felt that her bra was almost too small for her. Her breast seemed confined all of a sudden and her nipples ached. Ralph sucked her cunt lips into his mouth as his tongue snaked around in her snatch. Ralph still had not made contact with her clit and Betty desperately needed his tongue or his cock to touch her clit. She moaned in pleasure and frustration as Ralph continued to tease her. He again wiggled his tongue deep within her pussy before finally nudging her clit. Betty jumped as a spark of pleasure shot through her body. Ralph slid his hands under her curvy ass and lovingly cupped her shapely ass cheeks. He sucked her clit into his mouth and held it between his lips as he ran his tongue over the hard little pearl. Betty arched her back as she felt her orgasm approach. "Oh yes, oh my," she called out as the first wave rocked her body. Betty grabbed Ralph's head with both hands and pulled his face harder into her crotch. She vigorously humped his face as his tongue danced over her super sensitive cit. Her thighs clamped around his head and her entire body trembled as she came again almost violently. Betty felt her pussy pulsating as she covered Ralph's face with her female juices. Finally she collapsed back on the desk releasing him in the process. "Oh my God," Betty moaned. Ralph got between her legs. His huge cock looked menacing as it hovered above her hips. "Are you ready for this?" he asked smiling confidently. "Oh yes, yes please, fuck me now," Betty pleaded. Ralph held his cock and lined up the swollen head with the entrance to her sex. He pushed forward slightly allowing her tight cunt lips to open up for his impressive cock. He was about half way in when he pulled out and then slowly eased back into her causing her to moan in pleasure. Ralph would push in a little and then pull out a little slowly working his cock deeper and deeper into her vagina. Finally his entire cock was buried in her and Betty sighed feeling completely full almost afraid to move. This was a new sensation for her to be this full. Ralph held himself inside her waiting for Betty to start fucking him. He looked down at her and smiled and then she pulled him down to her and they kissed deeply with their tongues playing with one another. Betty was ready to be fucked and she needed his big dick to slide in and out of her and rub her clit. She began to move and then Ralph fucked her using long slow hard strokes. Betty locked her legs around Ralph's ass and pulled him into her. He began to fuck her harder and faster and she felt another orgasm on its way. She was at the mercy of his gigantic organ as it pounded her pussy. Betty was so hot and squeezed him with her tight pussy; she was really a good fuck. Ralph fucked through her one orgasm after another before he filled her pussy with cum. His orgasm was as intense as hers as their bodies ground together and they moaned and groaned loudly. Betty couldn't believe how much cum he shot into her pussy particularly since he had flooded her mouth earlier. This was a much different Ralph from yesterday. Betty could feel his cock as it still filled her cunt. Ralph slowly moved himself away from her body and in so doing his thick cock slipped from her pussy. Betty felt the void in her cunt as his cock left her body and she gasped as the coolness of the air touched her vacant pussy. Betty then could not stand the pressure on her breast any longer so she opened her blouse and unsnapped her bra. Both she and Ralph stared at her tits and nipples as they both had increased in sixe. Betty was lost for words and then she felt herself rolled over on her stomach. Ralph looked at Betty's ass and he could not resist running his hands over her shapely cheeks. Her ass was so amazing that he felt his loins stir with desire. He hard never seen such a perfect ass which is why he loved to fuck it. Ralph got behind Betty and kneaded her gorgeous ass cheeks. He then began to kiss her cheeks and run his tongue lightly in the crack of her ass. Betty wiggled her ass feeling very wicked as he tongued and kissed her. Ralph pulled her by the hips so that her legs were on the floor and her ass was perched over the desk. Betty's head was still on the desktop and she turned it to one side and let out a gasp as Ralph's tongue licked close to her asshole. Ralph ran his tongue from her pussy to her ass causing Betty to tingle in anticipation of what might be next. Ralph spread her ass cheeks with his hands and dipped his tongue into the crack locating her nether hole. His tongue slowly circled her anus and she flinched at the contact. He then pushed his tongue as far as he could into her asshole and he found herself wanting him to fuck her up the ass. She had been ass fucked enough in the past but this time she was worried about Ralph's size. He continued to ass fuck her with his tongue and she was at his mercy. Her desire grew as he worked her ass to the point that she really wanted more in her ass. Ralph removed his tongue from her ass and ran his hard cock between her ass cheeks as he spoke to her, "I want to fuck you in the ass Betty. Do you want me to fuck your hot ass?" "Oh yes Ralph, but you're so big now. You must use some cream," Betty replied to him with apprehension. Ralph took the lubricant from his desk and moved back behind her. Betty arched her back and pointed her beautiful ass back at him. He coated her asshole with a generous amount of cream and slid his thick finger in her hole. He took his time preparing her ass relishing every moment. He then coated his entire cock with the cream and placed the head at the entrance to her anus. Ralph pushed forward and the thick cock head squeezed into her tight asshole. Betty winched in pain as her asshole was stretched wider than ever and she gasped, "Go slow let me get used to it." Ralph withdrew his cock head and then pushed it back in this time causing more pleasure than pain. He pushed until a couple of inches were in Betty's ass. Betty found herself holding her breath and her body covered in goose bumps. He was so thick that her asshole stretched to new dimensions and held his cock in a vice like grip. Ralph slowly slid his dick in and out of her each time going a little deeper. The pain had subsided and was replaced with a feeling of fullness. Aliens Use Sex to Invade Humans Ch. 03 "Relax and enjoy my new found cock," urged Ralph. Betty relaxed a little and then felt more of his cock slide into her asshole. She grunted out loud as she felt fuller and than a wave of pleasure through her body. She was convinced that Ralph had his whole cock in her now but really he only had about half of his big dick in her. She felt so full so had no idea that he had another five inches before he was done. Ralph kept adding more and more of his cock to her ass. There was pain then fullness and then pleasure each time he went deeper. Betty would tense, relax and then enjoy it. This pattern continued until Ralph had all eleven inches buried in Betty's ass. "Oh my God, you are so big I feel so full," cried out Betty and then, "Uh, uh, uh oh yes, it's so good," she cried out. Ralph reached around and played with Betty's clit as he pounded her ass. Her pussy and asshole were on fire as the big cock reached previously untouched areas in her body. Betty was on the brink of another huge orgasm as Ralph methodically fucked her in her tight anus with his sizeable cock. Betty's tits ached as her nipples rubbed against the hard desktop. Betty realized that something was happening to her as well. Her tits were bigger than normal and her nipples were more sensitive then she could remember. Her pussy was on fire and she had no felt so erotic. Ralph loved watching his big cock slide out of her shapely ass and then plunge back in as his hips slapped against her curvy ass cheeks causing them to jiggle with each thrust. As Betty came and came her entire body went into spasm. Her pussy convulsed and clamped around Ralph's fingers coating them with her cunt juice. Betty's asshole pulsated as he drove his big cock in and out of it. Her ass involuntarily squeezed and released his huge member as he fucked it causing him to finally lose it. He slid his pecker deep into her rectum as his cock spasmed and sent a thick stream of hot cum into her channel. Ralph kept fucking her as load after load was fired into her ass as his cock kept twitching and spurting inside the impaled Betty. Betty had never felt so full of cum and there was no where for it to go blocked by Ralph's swollen cock buried in her ass. He slowed his pace and eventually stopped allowing his cock to remain buried in Betty's ass. He did not go soft right away and he gently moved his hips pushing cum around in her ass. Some of it trickled out and ran down over her pussy lips. Betty could not take any more fucking and she pleaded, "Please no more, I can't take any more, please stop." Reluctantly Ralph stopped and slowly withdrew his cock from her loosened asshole. He marveled in the sight of his enormous cock sliding out of her shapely ass. The man seed flowed from her asshole and ran like a river down over her pussy and between her sweet thighs. Ralph and Betty stayed in the same position for awhile and he massaged her beautiful ass as she remained bent over the desk with her ass perched in the air. Ralph pushed down lightly on Betty's back causing her to accentuate her ass even more. He loved looking at it and playing with it as she cooed. His cock remained hard and looked menacing around Betty's asshole. It was hard to believe that a cock that size had just fucked such a beautiful tight ass. Betty looked magnificent with her just fucked curvy ass in the air. Ralph took out the paper towels he kept in his desk drawer and wiped off his cock. Betty took the towels and cleaned her body of his semen. She still had no explanation as to why Ralph could cum so much and why his cock had grown almost overnight. When she tried to put her bra on it wouldn't fit. Her breast size had increased to a 36C and her blouse didn't button either. Betty's skirt was loose around her waist and she realized that she had dropped some inches. She was lost for words but she now had the figure that she had always dreamed of. "What's happening to us Ralph?" she asked nervously. "I don't know Betty. But it must have something to do with the space program. Maybe they are experimenting with a new drug or something but Rachel is not the same. I have not been the same either since we had sex together. I'll have to speak with her this evening and see if she knows what is going on." "My clothes don't fit me anymore," Betty added. "I know. Here wear my jacket out to your car and take the rest of the day off. Go shopping and pick up some new clothes," Ralph suggested. "Okay, I'll bring your jacket back tomorrow," Betty agreed. Betty left the office and Ralph flopped down behind his desk. He checked the time and saw that he and Betty had been fucking for three hours. He couldn't fathom how after cumming twice with Rachel before work how he could cum three times with Betty. There was something very strange going on and Ralph was convinced that NASA was behind it. While Ralph spent the morning fucking his secretary, Ricky had an interesting day of his own. During class he kept thinking about sex. He recalled every detail of sex with his mother and he tried to figure out what happened to his family and why his cock got so big. He also thought of Cindy and what she would say the next time they were together and she gave him a hand job. Ricky was so distracted that his one teacher lost her patience with his inattentiveness and sent him to the principal's office. When Ricky stood up to leave class he had a raging hard-on and it was very visible in his pants. Many of the girls in class snickered when they so the outline of his cock and his teacher was shocked by the size of it. Ricky made his way down to Principal Hastings office. Ricky entered the office and the secretary showed him into the Principal's office. "Ricky Cummings is here Georgette," the secretary announced. "Thank you Corrine. Please sit in the chair over there Ricky," the principal directed. "Sure Georgette," Ricky said cockily. "It's Mrs. Hastings, Ricky. Please refer to me as Mrs. Hastings," Georgette said firmly. Ricky smiled and half heartedly said, "Okay Mrs. Hastings it is." "That's better, now why were you sent to my office," she asked. "Because I wasn't paying attention in class, I was distracted," Ricky answered. "I see and what distracted you?" Hastings asked. The alien in Ricky's body then took over and for the next ten minutes Ricky explained to the principal what happened with his mother and his cock. The principal was in shock after hearing such a rude and improper answer. However before Georgette could speak again and scold him, Ricky shocked her by unzipping his pants and pulling out his semi-hard cock. "Georgette all this talk has got me turned on and I need to relax. I am just going to stroke my cock while we finish talking." Never in her career had anything like this ever happened to Georgette. No one had ever blatantly exposed themselves to her and certainly not in her office. Georgette looked at Ricky's impressive member as she tried to compose herself and find the right words. Georgette now knew that Ricky's cock was indeed bigger than any cock she had ever seen. "Ricky stop that this instant. Put your penis back in your pants and leave my office!" Georgette said in a shaken voice. "No Georgette I won't in fact I think that we are just getting started Georgette," Ricky said as he stood up with his cock in his hand. Ricky walked over to where Georgette was seated and let his cock bob in front of him as he approached her. Georgette was stunned and lost for words. She just watched as the handsome well endowed young man walked to her. Ricky took his cock in his hand and stroked it inches from Georgette's face. Georgette looked at it and she was drawn to it as if she were in a trance. She hadn't seen a real cock in years and now this beautiful looking young phallus was inches from her face. "Why don't you touch it Georgette? You know you want to. My mother liked having my cock in her mouth, her pussy and her ass," Ricky pressed on. Georgette stared at the imposing but beautiful cock in front of her and as if someone else was controlling her hand she grasped it. She just held it at first and then she stroked it. She let her hand glide up and down the thick long shaft and as she did she felt her loins stir with desire. "Now isn't that better? Why don't you kiss it now? My mother loves to kiss my cock and I know you will too," Ricky urged her. Georgette moved her lips to Ricky's cock and she kissed the smooth helmet head. She ran her tongue over his pee hole and caused Ricky to gasp aloud. Georgette tasted his pre cum as it formed at the slit and then she covered his cock head with her mouth. Georgette had now reached the point of no return and she was determined to suck Ricky's cock until he ejaculated in her mouth. Ricky closed his eyes and sighed as the principal gave him a first class blow job. Georgette had not sucked a cock in years but she still remembered all the right moves. Ricky was very sexually charged thanks to his alien companion and he knew that he would cum quickly. He did not warn Georgette that he was going to cum but just as she was running her tongue around the shaft of his cock, Ricky ejaculated into her mouth. Georgette was stunned with the first jolt of cum as it hit the back of her throat. She swallowed out of instinct as she knew more cum was to follow. She no sooner swallowed the first load then another load filled her mouth. This time Georgette swallowed and sucked Ricky's cock in even deeper. The third and the fourth hit the back of her throat but then the remainder trickled out of his cock onto her tongue. Georgette sucked on his cock until it softened in her mouth and she had sucked him dry. Ricky eased his flaccid cock from Georgette's mouth and watched as she licked her lips clean of any semen. He smiled at her as he relished his conquest and then he guided her over to the sofa in her office. As if she were in a hypnotic trance Georgette allowed her self to be led over to the sofa. Ricky knelt down in front of Georgette and pushed her legs apart. He pushed Georgette's skirt up to her hips and leaned over to kiss her creamy thighs. She gasped aloud at the touch of Ricky's lips to her naked skin. Ricky knew that she was struggling with the decision on how far she should let this go. Ricky was now aided by the alien who entered Georgette's body when Ricky came in her mouth and she swallowed his load. He could smell the sweet aroma of sex that was given off by her pussy as his face moved closer to her crotch. Ricky lifted Georgette's legs to his shoulders and kissed her inner thighs just below her panties. She groaned with pleasure as she reached down with her hands as if to control his head. Georgette tried to keep Ricky's head from reaching her pussy but he moved the panties to one side of her vulva baring her sopping wet cunt. Ricky tickled her outer lips with his fingers and then let them slip inside her vagina. Georgette was so wet that two of his fingers slid in easily and she unconsciously relaxed her grip on his head. Ricky moved his mouth toward her and closed it over her pussy shoving his tongue into her wetness. Georgette cried out and grabbed his head again but this time she held it tight to her quim. Ricky lapped at her pussy as he fingered her with two fingers. Then he spread her pussy lips apart and located her throbbing clit peeking out from its protective hood. Georgette was really excited as her erect clit looked like a teeny dick sticking out. Ricky sucked on her hard clit and she bucked her hips up into his face. Ricky reached under her and cupped her shapely ass cheeks in his hands as he drove into her pussy with his tongue and nibbled on her clit. "Oh sweet mother of God, I'm cumming. Hold me, please hold tight," Georgette screamed as she lost it. The climax rocked Georgette's body and Ricky held on for dear life as she thrashed, twisted and bucked all over the sofa. Ricky kept right on eating her pussy and he held onto her shapely ass as she thrashed about. Georgette slowly calmed after her intense orgasm and Ricky continued to lick her until her pussy was dry. As Georgette lay back on her sofa Ricky continued to lick and kiss her bare thighs above her stockings as she ran her hands through his hair. "Oh that was something I really came hard. Thank you, thank you!" she murmured almost unknowingly with her eyes closed and her head thrown back, the alien now in control. Ricky then peeled off Georgette's panties. Georgette watched him as if she was in a trance as he pushed his pants down to his knees and his rock hard cock leaped out. Ricky moved between Georgette's thighs and he placed his cock at the entrance to her cunt. Georgette shivered in anticipation. Ricky eased her back down on the sofa and proceeded to feed his long thick cock to her. "Oh we mustn't, we shouldn't, it is not right and then oh yes, oh it feels so good, oh, oh, fuck me, yes fuck", she cried. Ricky slid in and out of Georgette's pussy slowly allowing her to adjust to his size and he continued to go deeper with each thrust until he was buried balls deep in her pussy. Georgette was now his and she succumbed to his cock just as his mother had. The alien was now having its effect on the principal and she felt her breasts begin to ache. "Oh my I have never been so full of cock, fuck me, make me cum, make it last forever", she cried out. Ricky pounded her pussy making sure that his cock was in constant contact with her clit. Georgette had multiple orgasms as he fucked her. Ricky then pulled her blouse out of her skirt and pushed it up over her bra. Then he reached under her and unhooked the bra and pushed it up over her tits. Georgette's tits had not gotten larger as she was a busty woman but they had gotten firmer all of a sudden and her rock hard nipples extended out a ½ inch. Ricky twirled the nipples in his fingers and then he leaned over taking one then the other in his mouth. Georgette went wild telling him, "Oh yes, suck my tits, suck my nipples, fuck me good!" Ricky could feel his balls start to tighten and he knew it wouldn't be long before he filled Georgette's pussy with his cum. Georgette stiffened and then had another violent orgasm. She yelled, "Hold me, please hold me, I'm cummmming!" Ricky reached around behind her and pulled her toward him as she shook and trembled throughout her intense orgasm. As she was cumming so did Ricky and he fired a barrage of cum into her pussy. As Georgette started to recover Ricky laid her back down on the sofa and slowly fucked her as his cock remained hard. Ricky's cock was swimming in Georgette's cunt; there was so much cum in there mingling with her own juices. Ricky pulled out of Georgette's pussy and moved behind her on the sofa. Georgette was turned sideways and Ricky nestled up behind her. Georgette could feel Ricky's soft wet cock against her buttocks. Georgette was struggling with her inner self, how could she have let this happen. It was the worst possible outcome being seduced by a student. Her thoughts were interrupted by Ricky's voice. "I hope that you like anal sex because that has become my favorite. Now it is time for me to fuck your ass too," Ricky told her. "Please Ricky not my ass at least not here not now," begged the frightened principal. "There is no better time or better place and my cock is ready for you," Ricky pressed on. Ricky had Georgette kneel on the sofa as he located some lotion in her purse. He returned to Georgette and he began to caress her lovely ass cheeks and finger her nether hole. Georgette cooed when Ricky inserted a finger in her ass and then another finger in her pussy. He sawed the two fingers in and out for a few minutes loosening up Georgette's bung hole and putting her in the mood. Ricky then added a second finger to Georgette's ass. He worked the two fingers in and out of her ass stretching her as much as he could. Ricky then placed his big erect cock between Georgette's beautiful smooth round ass cheeks and pushed into her asshole. As he entered her Georgette pleaded, "It hurts, it hurts, please don't." But Ricky was not to be denied this beautiful ass and he was resolved to take her. Georgette tried to move away from him but Ricky held onto her and pulled her on his cock. Ricky had Georgette impaled on his huge cock between her ass cheeks and in her asshole. Ricky began to hump Georgette at a slow pace and then he fucked her quicker with his hips pumping into her. Georgette's moans were louder than ever as her body took Ricky's big cock. Aided by the alien present in her body, Georgette started taking Ricky's cock easier and unconsciously massaged it with her amazing ass muscles. Ricky pulled her back to her knees on all fours and reached around to feel her tits. Her nipples were rock hard as he twirled them in his fingers. Ricky then moved one hand down to play with her pussy and Georgette went wild humping her hips faster and faster. Ricky then placed both hands on her hips and watched his cock penetrate her curvy ass as she moved her hips in time with his humps. Georgette yelled out loud, "Oh my God, fuck me, fuck me, please fuck me!" Ricky complied with her demands and pounded her ass as hard as he could. Georgette squeezed her ass cheeks together as she orgasmed and Ricky joined her and shot a huge load of cum deep into her ass. Georgette screamed and moaned as she felt Ricky pump several shots of cum into her rectum. Georgette's beautiful body radiated heat as Ricky pumped cum into her ass. Georgette was almost out of breath but started to return to normal breathing as Ricky caressed her body lovingly. Ricky eased his cock from her ass and traces of cum ran out of her asshole between her cheeks and over her pussy. Ricky was amazed at his capacity to produce cum. He had cum twice that morning in his mother and now three times in the principal. Georgette tried to compose herself as she cleaned herself up and got dressed. Ricky pulled his pants back up and smiled at the principal. "We will have to do this again sometime," she said cockily. Georgette just nodded as she hung her head in shame wondering whatever possessed her to behave like that. She just hoped that her moans were not heard outside the room. Ricky left the office and the office staff had already left. He checked the time and then he realized that he and georgette had been fucking for hours. Ricky then hustled to the parking lot to meet Cindy who would be waiting for him to take her home. CINDY AND RICKY Cindy was waiting by Ricky's car when he arrived. She was a little miffed but forgave him when she learned that he was detained in the principal's office. Of course she had no idea why he was detained. The parking lot was almost empty so Ricky pulled his car over to a secluded area and began to make out with Cindy. Cindy had worn a short skirt and sweater to school that day and as she and Ricky made out in his car her skirt slid up and just covered her panties. Ricky was too busy kissing her and feeling her firm tits through her sweater to notice the skirt. Ricky slipped his hand under her sweater and caressed Cindy's abs. She just cooed and made no effort to stop him when his hand moved up to her breasts. Ricky massaged Cindy's jugs though her bra and his cock was again bursting in his pants. Ricky reached behind Cindy and fumbled with the catch on her bra and again she made no effort to slow him down. After unhooking her bra his hands returned to her tits and he pushed the bra up over them. Ricky couldn't believe how firm her tits were considering how big they were. Cindy now had her sweater and bra pushed up over her tits when Ricky lowered his mouth to suck on her nipples. Cindy gasped with desire as his mouth closed over her nipples and he sucked one and then the other. Cindy and Ricky had been this far many times before. Aliens Use Sex to Invade Humans Ch. 03 Ricky decided to go to the next step and he slid his hand along Cindy's creamy thigh. She cooed as his hand traveled up her leg and under her skirt as Ricky continued to suck on her tits. Cindy almost jumped through the car windshield when Ricky touched her panty covered pussy. Her panties were dripping wet and Ricky covered her mound with his hand. As Ricky rubbed her pussy and sucked her tits, Cindy felt herself losing it and she knew that she would cum soon. Ricky slipped his hand under her panties and eased one of his fingers into her virgin pussy. Ricky gently fingered her pussy and then he took one of his hands and placed it on his cock. Cindy couldn't believe the size of Ricky's cock as she felt it through his pants. It had never felt that big before. Cindy began to hump herself on Ricky's hand and finger as Ricky struggled to free his cock with one hand. Ricky finally managed to free his cock from his pants and he guided Cindy's hand back to it. Cindy grasped the thick shaft and began to stroke it up and down as Ricky continued to finger her pussy. Ricky then reached under Cindy's skirt and pulled her panties down and off of her. He then placed Cindy in the seat so that he could crouch down and eat her pussy. Cindy went wild when Ricky's tongue pushed into her pussy and she instinctively grabbed his head and held it in place. Ricky ate Cindy through a continuous string of orgasms until she had to push him away. Ricky then tried to get Cindy to sit on his cock but she was reluctant to fuck in the car. "I want to do it Ricky but not in the car," Cindy pleaded. Ricky was ready to bust a nut but he honored Cindy's request. Then he thought of his house and hoped that his mother was not home. Ricky told Cindy that he was taking her to his house and that they could be alone. Cindy actually was turned on by the idea of fucking Ricky in his own house. Cindy agreed and they left the school parking lot and drove to his house. On the way there Ricky continued to finger Cindy's twat and play with her tits. Cindy continued to play with Ricky's cock as well. An alien substance had traveled from Ricky's mouth to Cindy's mouth when the two of them swapped spit. The alien was slowly taking over Cindy's body while the alien in Ricky was refreshing his manly reserve. When they arrived at his home Ricky took Cindy up to his room without checking to see if his mother was home. Fortunately for them Rachel was visiting her girlfriend down the street. Within minutes they were both completely naked and in bed with Ricky's head back between Cindy's thighs. Ricky tickled her outer lips with his tongue and then let it slip inside her vagina. Cindy was so wet that his tongue slid in easily and she unconsciously tightened her grip on his head. He moved his mouth toward her and closed it over her pussy shoving his tongue into her wetness. Cindy cried out and grabbed his head again and held it tight to her quim. Ricky lapped at her pussy, spread her pussy lips apart and located her throbbing clit peeking out from its protective hood. Cindy was really excited as her erect clit looked like a teeny dick sticking out. Ricky sucked on her hard clit and she bucked her hips up into his face. He reached under her and cupped her shapely ass cheeks in his hands as he drove into her pussy with his tongue and nibbled on her clit. "Oh Ricky, I'm cumming. Hold me, please hold tight," she screamed as she lost it. The climax rocked her body and Ricky held on for dear life as she thrashed, twisted and bucked all over the bed. Ricky kept right on eating her pussy and he held onto her shapely ass as she thrashed about. Cindy slowly calmed down after her intense orgasm but Ricky continued to lick her until her pussy was dry. As they lay on the bed Ricky continued to lick and kiss her bare thighs as she ran her hands through his thick hair. "Oh I loved that. I really came hard!" she murmured. Ricky moved up between her legs as Cindy stared at the big cock about to enter her pussy. She had never seen Ricky's cock so big before now but she couldn't wait for him to fill her pussy with his meat. "Oh go easy and then oh yes, oh it feels so good, oh, oh, fuck me, yes fuck", she cried out as the alien increased her desire. Thanks to the alien presence in her body, Cindy felt no pain when Ricky broke her hymen. Ricky slid in and out of her pussy slowly allowing her to adjust to his size and continued to go deeper with each thrust until he was buried balls deep in her pussy. "Oh my, this is wonderful, fuck me, make me cum, make it last forever", she cried out. Ricky pounded her pussy making sure that his cock was in constant contact with her clit. Cindy had multiple orgasms as he fucked her. Cindy had large firm tits with rock hard nipples that extended almost an inch now. Ricky never remembered her nipples being so big and so hard. Ricky twirled the nipples in his fingers and then leaned over taking one then the other in his mouth. She went wild telling me. "Oh yes, suck my tits, suck my nipples, fuck me good!" and then she screamed, "Hold me, please hold me, I'm cummmming!" Ricky reached around behind her and pulled her toward him as she shook and trembled throughout her intense orgasm. As she was cumming so did he and he fired a barrage of cum into her pussy. As she started to recover Ricky laid her back down on the bed and slowly fucked her as his cock softened. Ricky's cock was swimming in her cunt. Ricky eased his big cock out of her pussy and lay down beside Cindy on the bed. He reached over and stroked her large firm tits and hard nipples as she still breathed deeply from the intensity of her orgasm. After a few minutes Ricky was hard again so he rolled Cindy over on her side and slipped his big cock back in her pussy. He reached around with both hands and held on to her big tits. Ricky let her nipples slip between his fingers and he held her nipples in a scissor grip as he fondled her big tits. Cindy never knew that sex would be like this, so intense and so frequent. Ricky seemed to be tireless and Cindy was beginning to feel insatiable. She wanted Ricky to fuck her forever or at least as long as they both could last. Ricky then slid his cock from her pussy to her ass and pressed ever so slightly then he put it back in her pussy and then he repeated the action. Ricky began dipping the head of his cock into Cindy's wet pussy and then sliding it back to her ass. It made her body quiver. Cindy pressed against him, wanting his dick inside her pussy, needing to feel him in her. The head of Ricky's dick was coated with the wetness from Cindy's pussy and his cream from his earlier cum shot. Ricky used his fingers and cock to smear the slippery natural lubricant around on Cindy's inner thighs and the crack of her ass. Ricky pressed his wet, throbbing dickhead against her tight asshole, and continued to stroke and rub softly against the lips of her pussy. Ricky did not hurry his actions, even though he could feel Cindy straining frantically against him. He continued to finger Cindy slowly and fondled her tits gently, teasing her body mercilessly. Although Cindy was aware of his cock pressing against her asshole, her attention was focused on the feelings flooding through her nipples, clit, and pussy. Even though the movements of his fingers were tender and measured, her erect nipples and distended clit throbbed and pulsed with desire. Ricky continued pressing his dick into Cindy's ass with the same slow steady rhythm. Cindy realized that Ricky wanted to put it in her ass and panicked and pleaded, "No please not that. I don't want to do that. Please Ricky everything has been so wonderful don't ruin it for us!" Ricky honored Cindy's request and backed off her ass. She was right it had been great to this point so why make her do something that they both may regret. Ricky rolled on his back with his large cock sticking up in the air. Cindy rolled over and then she had the oddest desire to take his big cock between her tits. Cindy moved down Ricky's body and positioned her tits over Ricky's cock. Then she held the cock between her tits and rocked back and forth. Ricky was turned on by Cindy's action and he got into it. He lifted his hips up and down as if he was fucking her and the combined actions had the desired effect. Ricky felt his balls tighten with his impending ejaculation and then he shot his wad right between her tits. Ricky's first cum shot hit Cindy in the chin and then the other streams coated her cleavage and his abs. Ricky's cock pulsed and throbbed as the cum shot out of his cock and Cindy could feel the cock throbbing between her tits. Cindy then did something she had never done before and she took Ricky's cock in her mouth. She caressed his bloated balls and sucked the remaining cum from his cock. Then the two of them embraced and kissed each other. Ricky's cum was pressed between their bodies and they embraced. Cindy felt a glow about her that she had never felt before. Then they heard a noise downstairs and Ricky knew his mother had come home. The two of them dressed quickly and then left Ricky's bedroom and went down stairs. Ricky's mother Rachel saw the teenagers and she knew immediately that they had been fucking. There would have been a time when Rachel would have been furious but not today. She was pleased that her son was fucking Cindy and she immediately though that they could have a foursome sometime with her husband. Rachel decided to invite Cindy over for a cookout on Saturday. "Cindy why don't you join us for a cookout this Saturday," Rachel offered. Cindy was pleased that Ricky's mom didn't yell about them being in the house alone and she accepted the invitation, "I'd like that. Thank you!" "Great please come over about two o'clock," Rachel confirmed. NEXT CHAPTER The aliens using humans as hosts continue to grow their population with sexual encounters. Aaron returns home and his son comes home from college with his gay roommate. Aaron catches his son and roommate in the act and decides to join them. Cindy's father is seduced by his daughter's charms and Cindy joins the Cumming's family for a cookout and meets some of their neighbors. Aliens Use Sex to Invade Humans Ch. 04 Author's note: I received an e-mail requesting that I write a story about aliens taking over humans and creating insatiable sexual desires. The person requesting this story had read another story on Literotica entitled Hosts. He was disappointed that the author of Hosts did not write any more chapters after the first submission, which is why he asked me to write about this topic. It is my first venture into this story category so let me know what you think. I will continue with story if the feedback in encouraging. Thank you! INTRODUCTION Four astronauts aboard the international space station are inhabited by alien hosts who use human sexual desires to re-populate their alien presence. The crew is returned to earth and after being briefed by the space agency they all return to their former lives. The alien's continue to use their human hosts to recruit other humans through the exploitation of sex. Chapter 01 – The International Space Station Chapter 02 – Astronauts are debriefed and return to duty Chapter 03 – Rachel returns to her family life Chapter 04 – Aaron meets his son's roommate Chapter 05 – Carl visits a gay bath house Chapter 06 – Sam resumes his private practice Chapter 07 – The alien population continues to grow using humans as hosts CHAPTER 4 – AARON MEETS HIS SON'S ROOMMATE AARON CATCHES HIS SON IN THE ACT Aaron had returned home from the NASA debriefing and his son Billy was home from college. Billy had brought his college roommate Butch home with him for a visit. That night the three of them sat around talking and Aaron described his experience on the space station but he did not tell the boys about all the sex. The three of them had a few beers while they talked and then it was time to turn in. The next morning Aaron was awake before the boys and he went down to the kitchen to make coffee. He wished that his ex-wife was still around as he was extremely horny and his dick had stayed hard all morning. His ex-wife Shelia had divorced him as she got tired of the life as an astronaut's wife. As the coffee was brewing he decided to check in on the boys. He went upstairs and was about to knock on his son's bedroom door when he heard Billy's voice. Aaron could hardly make it out through the closed door but he was sure that Billy was urging Butch to fuck him. This he had to see for himself. Aaron opened the door quietly and peeked through the crack. Sure enough Billy was on all fours and Butch was fucking him from behind. As Aaron watched the boys fuck he felt his own cock harden again in an instant. Aaron, with the alien's help at that moment, decided to fuck the two boys. He stripped off his shorts and his big eleven inch cock sprang to attention. Aaron entered the room quietly and walked around in front of Billy. Both Billy and Butch were shocked to see Aaron in Billy's room but they were even more shocked to see him naked with his big eleven inch cock fully erect. They stopped fucking and they both stared at his imposing cock. "I thought that you two may like to have some company," Aaron said as he waved his big dick in front of Billy's face. "Oh my God dad, we've never done it with anyone else," replied Billy in embarrassment. "Do it Billy, suck his cock. It's okay it's your dad. Let's make it a threesome," the always assertive Butch urged, "God look at the size of your dad's cock." Billy tentatively reached for his father's cock. He held the long thick cock in his hand briefly before he finally licked the head with his tongue. Billy couldn't believe the girth on Aaron's cock as he could not wrap his hand all the way around it. Billy opened his mouth and took the head into his mouth and he felt his jaw strain to accommodate his father's size. Billy only took about four inches of Aaron's cock into his mouth and began to suck on it. Butch resumed fucking his roommate as Billy sucked on his father's cock. The three of them were turned on and it didn't take long for Butch to cum and fill Billy's ass with his first massive load of the day. Aaron loved the blow job he was getting from his son as it was as good as any he ever had. Even though Billy was still adjusting to Aaron's size he did a good job sucking his cock. It had been a few days since Aaron had had sex so when he came he flooded Billy's mouth. Billy was taken back by the force and amount of cum that his father shot into his mouth. Billy had to pull off Aaron's cock to keep from gagging and the remainder of Aaron's cum splashed off of Billy's forehead and face. Butch emptied his balls into Billy's ass as he watched Aaron's massive load hit Billy's face. Billy wiped cum off his face and licked his fingers clean. As Billy swallowed his father's cum an alien substance made its way into Billy's system. "I need to cum," Billy gasped. Butch moved into position to be fucked and Billy got the lube and prepared Butch's ass. As Billy was fingering Butch's shapely ass Aaron decided that he would fuck his son. Aaron took the lube and fingered Billy's ass. Billy was leery of Aaron's big cock and he hoped that his father wouldn't try to fuck him. Billy slipped his cock into Butch's ass and began fucking him while Aaron continued to finger fuck Billy. Billy actually liked the anal penetration as he fucked his roommate and he wished that his father had a smaller cock so that his father could fuck him. Aaron satisfied that Billy's ass was well lubed applied a generous amount of lube to his own cock. Aaron moved in behind Billy and pushed his cock into Billy's asshole. Billy panicked and pleaded with Aaron not to fuck him. "Dad please no, you're too big, I can't take you in my ass," Billy begged. "Nonsense, if Rachel, Sam and Carl could take my cock in their ass you certainly can. You just need to be broken in some more," Aaron replied. Billy then remembered that Rachel, Carl and Sam were astronauts on the space shuttle with his dad. "Fuck him Aaron, fuck his ass just like he's fucking mine," Butch urged. Billy's fate was sealed and Aaron eased more of his cock into Billy's ass. Aaron was gentle though relentless in his quest to fuck his son. Aaron would push in a little and stop allowing Billy to adjust along the way. Finally Aaron began a rocking motion and began fucking Billy slowly. Billy's ass had stretched enough now that he was comfortable with Aaron's cock in him and he resumed fucking Butch. As Billy picked up the pace fucking Butch in the ass he was pushing his own ass back onto Aaron's cock. Then something happened to Billy. Butch's ass was tightening around Billy's cock. Billy had never felt Butch tighten his anal passage as he was doing now as Billy's cock was being squeezed. "Holy shit Billy your cock is getting longer and thicker in my ass. What the hell is happening?" Butch yelled. Billy then realized that his cock was growing in size in Butch's ass but how could that be happening? Aaron stopped moving as he didn't have to while Billy was fucking Butch. Billy would bury his cock in Butch and in the process his ass would slide along Aaron's cock. When Billy withdrew slightly from Butch's ass he impaled his ass on Aaron's cock. Aaron inched closer and closer as Billy seemed to be able to take more and more of his cock. Then Billy felt Aaron's pubic hair brush against his buttocks and he realized that Aaron was all the way in his ass. Billy couldn't believe that he had taken all of his father's big thick cock. Billy was proud of himself now and he picked up the pace fucking Butch and impaling himself of Aaron's cock. Aaron came before Billy did but when Billy felt cum shoot into his ass he lost it. Billy's buttocks tightened as he plunged his cock all the way into Butch's ass and unleashed his first load of the day. Billy flooded his roommate's rectum with an enormous load one of the largest he could remember. As Billy's buttocks clenched and unclenched as he came in Butch's ass, he milked every drop of cum from Aaron's cock. Aaron caressed Billy's shapely ass as he let his cock be milked dry. Aaron liked looking at the tanned boys with their lily white asses. The fact that they had tan lines emphasized the shape of their curvy bottoms. Butch was erect again after the fuck session and he stared in amazement as he watched his cock grow in front of his eyes. Butch too had been invaded by the alien who now took over his body. Butch felt the tremendous need to cum so he had Billy suck his cock. Aaron watched Billy suck his friend's cock and then he too got hard again. Billy was also hard again after sucking his friend and swallowing his load. This time Butch would take Aaron's cock in his ass as he sucked Billy's cock. The three of them fucked and sucked until they were drained and exhausted. Aaron, Butch and Billy finished their marathon fuck sessions. Aaron had fucked and cum in both Butch's ass and Billy's ass while the boys took turns sucking each other's cock. Then Aaron was blown by Billy as Butch fucked Billy in the ass. Then Butch had sucked Aaron's cock while Billy fucked Butch's ass. Aaron had cum four times, once in each of the boy's holes. They lay drained on the bed and then Aaron told the boy's of his plan for them to fuck Billy's mother. The boys listened intently and excitedly as Aaron told them about inviting Shelia over. Aaron lied to the boys when he told them that Billy's mother always had a secret desire to have sex with two or three men at the same time. "Really she wants to have group sex?" asked Butch not hiding his excitement. "Yes she does I can think of no better partners than you two. Just wait until she sees your big cocks and mine," Aaron told them. The two boys looked at their renewed cocks and they were mystified how they had grown in just one day. Aaron knew something was awry because every time he had sex with a male their cocks got longer and thicker just like his. When he had sex with a woman her body changed for the better and she became insatiable. He also had the capacity for more sex than ever in his life. He knew that it had to have something to do with his time in space. He still remembered how insatiable he, Rachel, Sam and Carl had become in space. Now he was planning the seduction of his ex-wife with the help of his son and another boy. "Fuck my own mother! No way I couldn't do that besides I have never fucked a pussy," Billy blurted out. "You don't have to fuck her pussy, I'll do that. You guys can take her ass and her mouth. She loves it in the ass and she loves to suck cock," Aaron lied. Then the assertive Butch spoke out, "Let's do it. Billy you fuck your mother in the ass and I'll fuck you in the ass. Then we will switch and I bet with a cock in our ass we can stay hard and fuck your mother." "I don't know Butch, my Mom?" Dannie questioned. "You heard Aaron, she loves it and she wants it. I say we do it," Butch affirmed. Aaron left the two boys in his son's bed to call his ex-wife. SHELIA IS SEDUCED BY THE ALIEN POWER Shelia took her ex-husband's phone call and took the bait that her son wanted to see her. Shelia made her way over to the house the next day but when she arrived, Aaron told her that Billy had stepped out for a moment. Aaron under the alien's power kissed Sheila deeply but she stepped back and slapped him. "What do you think you are doing?" she screamed at him. "Sorry it's been so long and I am happy to see you," Aaron explained his action. "That's no excuse, you know I am seeing Roy these days," she said sternly. But the kiss had been just wet enough for an alien substance to transfer to Shelia and as it made its way through her body she felt the change in her. Aaron noticed the change too and he took her in his arms and kissed her again. This time she kissed him back and they began to rip off each other's clothes. Sheila's tits got bigger and firmer, her waist got narrower and her stomach tightened up. She stared at Aaron's cock and it was almost twice the size that she remembered. Aaron picked her up and carried her into his bedroom and she forgot all about her son for the moment. Aaron lay on his back as Shelia began a slow descent from his lips to his massive cock. Soon she had Aaron's rock hard cock in her mouth. Aaron turned around so that he could get to her pussy and he began to eat her as she sucked his cock. "I can't believe that I am getting so hot," Shelia said, "I have to have your cock in me I am going to sit on your cock," she gasped. Shelia straddled Aaron's body and lowered herself onto his cock. She moaned as it filled her pussy and then began to slowly rock back and forth. It was obvious that she wanted this fuck to last for awhile. Aaron cupped her ass as she rocked back and forth and then he began to play with her asshole. He grabbed the lotion near the bed and applied a generous amount to the crack in her buttocks. He pushed one then two fingers into her asshole as she continued to ride him. Aaron could feel his own cock in her vagina through the thin membrane. Shelia was going wild with the double penetration and she humped him faster and faster. "Oh this is going to be a big one, hold me hold me," she pleaded. Aaron held her tightly as Shelia exploded with an intense orgasm. Shelia shook and moaned as she squirted her woman cum all over his cock. She collapsed on Aaron's body as he continued to fuck her slowly. Aaron looked over her shoulder and saw Billy and Butch standing there naked and both sporting huge erections. They must have come in the room while Shelia was cumming. Aaron smiled and motioned to Billy pointing to Shelia' ass. He nodded getting Aaron's meaning. Aaron nodded toward the lotion on the table and Billy picked it up. He lathered up his cock with the lotion and then he moved toward the bed. Aaron grabbed Shelia's buttocks and pulled them to the side putting her asshole on full display. She was starting to get aroused again so she resumed her movements on Aaron's cock. Billy knelt on the bed and aimed his dick at his mother's asshole. She stiffened when she felt the intrusion. "What the," she exclaimed! "It's okay it's Billy and his roommate Butch," Aaron assured her. Billy eased his cock all the way into her ass and began fucking her. Soon the father and son had a good rhythm going and they could feel each other's cock through the thin membrane separating them. All of this was too much for Butch and he lubed his cock with the lotion and knelt behind Billy to fuck him in the ass. "Billy you shouldn't being doing this! Where is your friend Butch?" Shelia questioned. "Right now he is in Billy's ass fucking him as we fuck," Aaron replied. "Sweet mother of God," she exclaimed somewhat in shock! Their cocks were sliding in and out of Shelia in perfect harmony. As Aaron slid out of her cunt Billy filled her asshole. When Aaron filled her pussy Billy slid out of her ass and experienced Butch's cock penetrating his ass fully. Aaron had the best vantage point and he could see the looks of ecstasy on their faces. Shelia was moaning and trembling with the double penetration and Billy was in another world as he fucked and got fucked at the same time. Butch had a look of determination on his face as he pounded Billy's ass. They kept on fucking one another and they were getting close to cumming when Billy called out, "Oh Butch, oh Butch." Butch called back to him, "Its okay we are all cumming." Butch yelled, "I'm going to shoot." Aaron watched Butch stiffen and bury his cock deep in Billy's ass as he filled it with his man seed. This seemed to set Billy off as his body stiffened at first and then leaped several times like a coiled spring as he came in Shelia's ass. Shelia felt Aaron's cum fill her womb for the first time that day. It seemed that Aaron would not stop cumming as he fired streams of cum into her filling her pussy to overflowing. Shelia collapsed on top of Aaron crushing her larger firmer breasts into his chest as her hips gyrated out of control. Aaron could feel her juices soaking his cock once again. The looks on all the faces were ones of bewilderment and ecstasy. They all lay still on top of one another as the three bodies had collapsed with Aaron on the bottom. Finally one by one they separated. Billy and Butch stood beside the bed and they all looked at one another somewhat in disbelief of what just happened. Shelia finally broke the silence. Shelia sheepishly got out of bed and ran into the bathroom. She was clearly embarrassed by what had happened but most of all she was embarrassed because she had enjoyed it so much. Butch exclaimed, "Man that was the wildest sex I have ever been involved in." Butch continued, "To see your mother being double fucked was unbelievable and I was so turned on I just had to join in and fuck Billy." "Yeah, it was pretty wild okay. I wasn't sure how she would react but she did seem to get into it," Aaron replied. "She is probably thinking about it in the bathroom and trying to figure out what she will say to us," voiced Butch. They continued a three way conversation about the sex act and replaying how they felt. As they talked Aaron noticed that Butch and Billy were getting hard again. The amazing recuperative powers triggered by the alien were at work once again. Then they started to play with each other's dick and soon they were ready for more action. "This time I fuck you" Billy said to Butch. Butch got up on all fours and arched his back wiggling his bubble butt at Billy. Billy slipped behind him and re-lubed his cock and Butch's asshole. Billy slid in easily to the well used ass and began to fuck Butch. "Aaron, stick your cock in my mouth, please" Butch requested. Billy then coaxed me, "Dad do it. I want to see him suck your big cock again while I fuck his ass." Aaron moved over to Butch and presented him with his semi-erect cock. Butch took Aaron in his mouth and before long he had him rock hard. Butch was a very accomplished cocksucker and he knew just how to keep Aaron hard until he came. Billy was fucking Butch's ass as Butch was sucking Aaron's dick. Butch had a hard-on just from the action he was getting. Aaron looked up to see the bathroom door open and saw Shelia standing there watching them suck and fuck. She dropped her towel and moved closer to them. She looked down at Butch's erection and then shocked everyone all by dropping to her knees and taking the cock in her mouth. Billy and Aaron smiled at each other as Butch gasped on Billy's cock when he felt Sheila's mouth envelop his dick. This act by Shelia set the guys all over the edge and all of them ejaculated into the accompanying receptacles. Aaron filled Butch's mouth with cum as Billy filled Butch's asshole with his seed. Butch moaned and groaned as he filled Billy's mother's mouth with his cum. Shelia continued to suck on Butch's cock until she had drained him of all his cum. Butch collapsed on the bed with Billy behind him. Aaron sat on the bed and Shelia sat next to him. Aaron lay on his back so that Shelia could straddle his cock as she did before. She slowly sank down burying Aaron's cock in her juicy cunt. Billy lubed up his cock and her ass and slid his dick into her bunghole. Butch presented her with his hard cock. Shelia started going wild humping two cocks and sucking another. Aaron could feel her squirting her pussy juice all over his cock. She was incredibly turned on. Billy called out, "Butch switch with me." Butch and Billy traded places as Billy presented his hard cock to his mother's mouth and Butch slid his huge erect dick into her ass. This was more of a turn-on then they expected and soon we were all cumming in Shelia's holes. Butch strangely enough was the first to cum and screamed out, "Oh man, I'm cumming, I'm doing it, and I am cumming in your ass." Billy came next flooding his mother's mouth as Aaron filled her womb with a generous amount of cum. Shelia shook with her own orgasm and collapsed on Aaron as Butch collapsed on her. Aliens Use Sex to Invade Humans Ch. 04 Over the next 24 hours Shelia had sex with her son, her ex-husband and Butch continuously. Some times she had three cocks in her at the same time. Other times Shelia had sex with Aaron alone or with her son. Billy was only comfortable fucking his mother in the ass or letting her suck his cock. Butch agreed to fuck her pussy to see if he could and he was able to remain hard and cum in her pussy. Shelia was thrilled because now she could have Butch in her pussy and Billy in her ass and they were all able to cum. Shelia still sucked her son's cock while they fucked each other in the ass. Shelia had waited a long time for sex since her divorce and now she had more than she would ever have imagined. Aaron balanced his time between Shelia and the boys. There were times when he just fucked the boys and let them suck his cock. Other times he was with Shelia and he would cum in all three of her orifices. And at other times the four of them all had sex together. Sheila didn't want to leave the house as she loved the attention she received from the three large cocks but she eventually had to go home and the boys had to go back to college. Sheila knew she would be back to sample more of her husband's renewed huge cock. Aaron was still curious about the changes that happened to his body and others when he had sex. He decided to call Rachel, Sam and Carl to learn what they were experiencing. If they were having similar experiences, Aaron decided that he would contact NASA and report the unusual behavior. CINDY AND HER FATHER Cindy always slept in the nude and many a morning her hands would travel over her body caressing her tits and fingering her pussy as she reflected on her boyfriend. Sometimes Cindy got carried away and she moaned softly as she made herself cum. Her actions did not go unnoticed. Her father Mike was usually awake when he heard his daughter's moaning from time to time. One morning he was awake earlier when he decided to look in on his daughter. He quietly opened her bedroom door and stared at her fabulous naked body. Mike was very turned on by his daughter's nakedness and found himself desiring her. Over the past few weeks, he would watch her for longer periods each time and then head back to his bedroom to jerk off while fantasizing about fucking his daughter. Mike would go to his daughter's room right after his wife left for work so that he could spend more time looking at his naked daughter. Mike began to get bolder and bolder with each visit to his daughter's room. As he watched his naked daughter in bed he began to stroke his cock. He had gotten to the point where he didn't return to his bedroom to jerk off but he stayed in his daughter's room and ejaculated there. One morning Cindy realized that her father was in the room and she made believe she was still sleeping. She peeked through her half closed eyes and watched her father masturbate as he looked at her body. Cindy was pleased that her father was turned on by her naked body and that he would cum just from looking at her. Cindy looked forward to the morning visits from her father to look at her naked body. She became to tease him relentlessly as she faked being asleep and having erotic dreams. Cindy would roll over on her stomach so that her father could see her ass then she would roll on her back and open her legs so he could see her pussy. Cindy made believe she was dreaming and ran her hands over her body moaning as she caressed her tits and stroked her vulva. Mike was going mad as she watched his daughter and his hand flew over his cock. Cindy rolled over on her stomach and lifted her hips off the bed slightly as she fingered her pussy. Her father went wild looking at his daughter's undulating ass. The morning after her torrid sex with her boyfriend Ricky, Cindy took it one more step as she fingered her pussy, "Oh yes fuck me," she whispered loud enough for her father to hear. That did it for Mike he simply had to have his daughter. Mike stripped off his clothes and crawled in bed with his daughter. He moved between his legs and put his mouth right on her pussy. Cindy gasped when she felt her father's mouth cover her vulva and almost screamed out when his tongue penetrated her pussy. Cindy was overcome by the sensation. Cindy shivered and trembled under her father's hands and kisses. Then she cried out when Mike first swiped her pussy with his tongue. Mike lifted her legs up to his shoulders as he covered her pussy with his mouth. Mike could the feel the firmness in Cindy's thighs and firm quads. She clamped her legs tightly around her father's neck as he delved in to her inner depths. Mike located her erect clit and sucked it into his mouth emitting an audible gasp from her. Mike then reached under her and grabbed a hold of her curvy buttocks. Mike loved the firmness of his daughter's muscular ass cheeks as she tightened them. Cindy was really hot and she humped her father's face as he sucked on her clit. She started to cum and Mike held her thrashing body tight against his mouth. His hands dug into her firm ass flesh as she went wild with her first orgasm ever from oral sex. "Oh, oh, oh God, her it cums," she screamed as her orgasm rocked her body. Mike held his daughter tight and sucked every drop of female love juice from her pussy. Cindy writhed and gasped all throughout her intense orgasm until finally her climax subsided and her body calmed. Mike licked her tenderly until she couldn't take any more and she gently pushed her father's head away from her pussy. There was no more pretending now as they both became lovers. Then Mike felt the strange feeling pass through his body as the alien had invaded him through his daughter's nectar. "Wow that was incredible Daddy!" she sighed. Cindy leaned over and took her father's cock in her mouth gently nibbling on the cock head. Mike was a little surprised by his daughter's action but she had obviously done this before. Mike fondled her tits as she sucked him deeper in her mouth. Cindy took her mouth off of his cock long enough to tell her father that he had a beautiful cock and then she sucked it back in her mouth. Cindy sucked her father for awhile longer until she was hot again. Mike was stunned as he watched his cock grow to new dimensions. "I am really hot. I need your cock in me Daddy," she gasped. Cindy lay back in bed, spread her legs and she beckoned her father to come to her with her arms open. Mike knelt between her thighs and slipped his cock into her pussy. Cindy closed her eyes and sighed as her father's rock hard cock entered her. Mike began to fuck her slowly as his now huge cock settled into her snug pussy. "You feel good in me. I like your big cock in my pussy," she told him. Mike's cock was all the way in now and Cindy wrapped her muscular legs around his lower torso. They picked up the pace as they fucked and Mike soon found himself pounding Cindy's pussy. She pulled her father into her with her strong legs as he fucked her and they both raced toward their climax. Mike could feel his orgasm building in his balls and he knew it would be a big one. One more thrust and Mike's body tightened as he emptied his balls into his daughter's pussy. Cindy felt the surge of his semen flood her pussy and she fucked even faster in search of her own climax. Cindy made sure that her clit stayed in contact with her father's shaft as she raced toward her orgasm. Cindy stiffened and cried out that she was cumming as her legs clamped tightly around her father's body. Her pussy involuntarily squeezed his cock. Mike could feel the vaginal muscles clench and release his cock over and over again until his daughter finally went limp under him. They were both sweating from the intense fuck session when Mike rolled to his side allowing his softening cock to slip from his daughter's cunt. Cindy just lay on her back looking up at the ceiling and breathing shallowly. "Daddy you are a good lover. That was a great fuck," Cindy sighed. "I would say that you are very good yourself," Mike replied softly. Cindy snuggled into her father and he put his arm around her. He stroked her firm tits and teased her rock hard nipples as they lay together. They didn't say much as they lay together but Cindy began to stroke her father's cock and held it lovingly in her hand. Mike started to harden again and she smiled at his response to her fondling. Cindy slid down her father's body and took his cock into her mouth again. Mike moved his daughter's hips over his face so that he could lick her pussy and they settled into a comfortable 69 position, another first for Cindy. He caressed Cindy's incredible ass and teased her nether hole as they ate each other. Mike moistened his daughter's asshole with her own pussy juice and his saliva before pushing his finger into her ass. Cindy seemed to accept the finger in her ass and they ate each other until they both came again and then returned to a side by side position. Mike got Cindy out of bed to shower with him. He loved washing her sexy body, soaping her tits, fingering her pussy and her asshole. Mike slipped a soapy finger up his daughter's ass and fondled her curvy firm buttocks. His cock was back at attention so he moved behind her and slipped his cock into her soapy asshole. Cindy grunted as her father's cock penetrated her lovely ass and she leaned forward to place her hands on the shower wall. Cindy arched her back accentuating her shapely ass as she leaned forward. The sight was incredible as Mike slid his huge cock in and out of his daughter's beautiful ass. The scene was even more erotic given that they were in the shower and his daughter's skin glistened with moisture. Mike tired to prolong the ass fuck as long as he could but he was so turned on that he came quickly. Mike flooded Cindy's ass with his seed and she groaned as it filled her anal cavity. Mike was able to stay hard and he kept fucking his daughter's ass even though he had emptied his balls. He was now able to manage back to back orgasms without losing his erection. He fucked Cindy's ass until he came again. It took a while before he came again and he was able to savor the incredible sight of his cock sliding in and out of his daughter's marvelous ass. Mike's cock softened and slipped from Cindy's ass and they stepped out of the shower just as the water was starting to turn cold. They went back to be and Mike couldn't believe his renewed capacity for sex or his daughter's insatiable sexual appetite. She watched as him as he crawled between her parted legs. He parted them even wider, taking his time to look at her wet snatch in detail. Then he slowly lowered his head, breathing in deeply and smelling her sex. Cindy could feel his breath on her snatch when he suddenly opened his mouth and licked the length of her slit. Cindy writhed with pleasure and played with her tits. Mike teased her with his tongue for a while and then he used it to part her pussy lips encountering more wetness. He lapped up her juices and started flicking his tongue across her clit. Cindy moaned louder and louder as Mike knew exactly how to please her hungry cunt. He sucked on her clit for a while and then he slid his tongue inside her tight hole. He tongue fucked her, faster and deeper, applying pressure to her clit with his nose. Cindy pulled at the headboard with her hands as she wrapped her legs around her father's shoulders and thrust her hips up to feel more of him. When she couldn't hold back anymore she cried out loud and her pussy juices showered his face as she orgasmed. He crawled up next to her and kissed her deeply, sharing the juices with her. Cindy could feel his cock getting hard against her hips again as he lowered his head and started sucking her nipples. It felt so good. He sucked and bit her tits, pulling them and kneading them. Cindy was soon on fire again and she wanted his cock so badly. "Fuck me, Daddy," she begged breathlessly. "That's better," he smiled. "Pull your legs up and open yourself wide for me." Cindy did as she was told. She grabbed hold of her legs and pulled them wide apart, showing off her dripping pussy. Mike kneeled by her cunt and jerked his cock, getting it really hard. He ran his cock head the length of her wet slit and then he entered her cunt with the thick cock head and stopped there. "Oh yeah, baby," he gasped. "You're so hot. I love fucking your cunt." "Oh yes," she moaned. "Fill me with your thick meat." With those words he slowly started burying himself deeper inside her cunt. Cindy felt herself stretching to accommodate his full size and he felt great inside her. This was what a cock was supposed to feel like. This slow, torturous pleasure was what fucking was supposed to be like. When he was buried all the way inside her cunt he stopped, smiled at her and started sucking her tits again. They lay like that for minutes. Her father's cock was firmly lodged in Cindy's hungry cunt and he was sucking her nipples. She was impatient to feel more but he refused to move. He was in control of her pleasure. When he was ready he placed his hands on either side of her to give himself support and then he slowly slid his fuck meat almost completely out of her cunt. Only the tip was still inside her hole and Cindy moved her hips upwards to get him back. She wanted him to fuck her. She wanted him to fill her again. "Fuck me, please!" she begged him. Then he quickly pounded back inside her again. His balls slammed into her ass as he filled her cunt. He pulled out again and slammed back inside. With an ever increasing pace he was burying his cock deeper and harder inside her tight hole. He slammed inside his daughter harder and harder and every thrust went straight to her clit, sending an electric shock through her body. Cindy was breathing faster and faster. She couldn't believe the pleasure he was giving her. She loved every moment of the fucking. She moved her hips to meet his thrusts, to get as much of his fuck meat inside her. She could hear the sounds of their fucking get wetter and wetter as her hungry cunt worked overtime to produce more juices. She knew that she wouldn't last much longer. "I've got to cum," she panted. "Oh yeah, baby," he whispered against my skin, "Cum for your daddy!" With those words she felt her pussy contracting tight around his shaft. He kept fucking her at the same pace as before while her pussy shivered and convulsed around his thick meat. When she was done cumming he pulled out and put her on my hands and knees. He wasn't done yet. His cock was still big and hard and he was going to get satisfaction from her pussy. He easily slid his cock into her waiting hole. Cindy was ready to take his cock again. He managed to get even deeper from behind. He slammed harder and faster now. Each thrust sent his balls crashing into her sensitized clit. Then he pulled her up by her tits and with her full breasts in his hands he nibbled at her neck. "Your cunt is so sweet and tight, baby," he whispered as he kept pumping into me, hitting her womb with every thrust, "You make daddy feel so good." Cindy's breathing grew heavier and she knew that she was about to surrender to his fucking once more. Her pussy squeezed tight around his cock and her body shook. She moaned out loud and Mike stopped his fucking. With her pussy gripping his cock hard and milking him he thrust deep inside her and roared as he released his spunk straight up her hungry cunt. When we'd both stopped cumming he pulled out of her and collapsed next to her on the bed. They were both sweaty from the sexual exercise and he pulled her tight into his arms. "You are a great fuck, baby," he said and smiled. She kissed him as she heard those wonderful words. Cindy straddled him and he guided her father's cock back into her cunt. She rode him fast and furiously as he played with her bouncing tits. "God, you're insatiable, Daddy. That lovely cock is ready for more." Cindy gasped. "Do you mind?" Mike quipped. "Of course not do what you like. I'm yours for your pleasure. Anyway you want it." Cindy offered. "You're too good to be true. Anything I want?" Mike teasingly challenged his daughter. Cindy rolled off her father and got on all fours waving her ass at him. Cindy raised her butt into a half kneeling posture. She stared at her daddy while she sucked the middle finger of her left hand into her mouth. When it was wet enough she drew a shiny line down her body to her back door. Gently spreading her ass cheeks she wet the puckered hole of her ass and probed her fingertip in ever so slightly. "I think you I know what you want daddy," Cindy teased. "Oh yes I want to be in your ass?" Mike said excitedly. "Oh yes, Daddy. Do it here. Fuck my ass with your lovely cock. You know you want to. And I want you to," Cindy pleaded Smiling Mike knelt behind her on the bed. Cindy cooed and encouraged him while she smeared her juices from her pussy to her ass to lubricate it in readiness. The large purple head of his dick prodded his sexy daughter's asshole and slid across the puckered entrance. Mike first slid his thick cock deep into her cunt to get it moist with her natural juices. Cindy groaned aloud as her pussy was still very sensitive from the recent fucking. Mike made a few slow strokes and watched as Cindy poked her finger ever deeper into her bum hole. Soon she was knuckle deep and Mike's prick was slick with her pussy cream. Extracting her digit she looked back and smiled at her father. "I'm ready now," Cindy cooed. Mike eased his big cock from her pussy and trailed it up to her bum. Cindy positioned the cock head against her hole and pressed back with her body. Mike matched her movement with a gentle forward push. The very tip of his cock started to enter her tight hole. Cindy's face was a picture of sexy concentration, her brows pinched and her mouth drawn tightly shut. The big cock eased slowly into her back passage. She relaxed her muscles and slowly welcomed her father's tool into her most private place. Eventually it is in all the way to the hilt and Cindy looked back at her father and smiled "Are you okay baby?" Mike asked concerned. "Yes! Fuck me but do it really slow," She requested. She clearly loved the solid feeling in her ass. Cindy rubbed her clit, which served to drive her to another orgasm. There was sweat on both their bodies as Mike held his daughter's waist and slid his dick in and out of her now gaping asshole. He was admiring her ass and he couldn't believe that he was fucking his daughter's ass again. Cindy's attentions on her pussy were having the desired effect and she was nearing another orgasm. She hoped that they could climax together so she told her dad she was going to cum. "I am too baby, very soon," Mike strained to talk. His pace quickened again and he changed to shorter faster strokes. He was pumping her hole telling his daughter that he would soon cum. She was gasping, grunting and straining toward her own orgasm. Faster and faster her fingers flew over her clit. Her body started to convulse with a powerful orgasm. At the same time Mike came, he jammed his cock into her ass to the hilt and felt it as it jerked and spewed his spunk deep into her anal passage. He fell forward on top of his daughter with his cock still buried in her and still twitching and spitting its cum coating her anus. Cindy's orgasm matched her daddy's in length and fury. Surge after surge of pleasure shot through her body and each new wave was triggered by each new twitch from her father's exploding cock. The two of them lay together and cuddled on the bed with her father's cock still twitching in her ass. Eventually Mike went soft and his cock slipped from his daughter's curvy ass. The two of them stayed in bed for another hour caressing and playing with each other. They would have to figure something out so that they could somehow continue their incestuous affair but for now they enjoyed their time together. Aliens Use Sex to Invade Humans Ch. 04 NEXT CHAPTER Carl is hornier than ever and decides to visit a gay bath house for the first time. His reputation spreads quickly among the other patrons that night and they are soon all clamoring for sex with Carl. The alien is passed from person to person and by the early morning hours they are all changed forever. Aliens Use Sex to Invade Humans Ch. 05-07 Author's note: I received an e-mail requesting that I write a story about aliens taking over humans and creating insatiable sexual desires. The person requesting this story had read another story on Literotica entitled Hosts. He was disappointed that the author of Hosts did not write any more chapters after the first submission, which is why he asked me to write about this topic. This is the final chapter in this series. INTRODUCTION Four astronauts aboard the international space station are inhabited by alien hosts who use human sexual desires to re-populate their alien presence. The crew is returned to earth and after being briefed by the space agency they all return to their former lives. The alien's continue to use their human hosts to recruit other humans through the exploitation of sex. Chapter 01 -- The International Space Station Chapter 02 -- Astronauts are debriefed and return to duty Chapter 03 -- Rachel returns to her family life Chapter 04 -- Aaron meets his son's roommate Chapter 05 -- Carl visits a gay bath house Chapter 06 -- Sam resumes his private practice Chapter 07 -- The alien population continues to grow using humans as hosts CHAPTER 05 - CARL'S FIRST VISIT A GAY BATHHOUSE Carl had never been to a gay bathhouse but he had heard about them and he knew what went on there. The alien in his body picked up on Carl's thoughts and directed Carl to go to the bathhouse. That Friday evening Carl made his first ever trip to the bathhouse and it was a night for all to remember. When Carl entered he paid a fee for a locker opting not to take a room. He stripped off his clothes and walked brazenly around the bathhouse without wrapping the towel around his waist. Carl looked better than he ever had in his life since the alien took over his body. He was lean and trim and his cock was longer and thicker than it ever had been. Carl noticed that there were men all ages, sizes and shapes at the bathhouse and that many eyes were focused on him. Carl walked into an area where a large number on men milled around playing with each other's cocks and asses. Within seconds there was a hand on Carl's cock and minutes later his cock was in the mouth of a middle aged man. As Carl was sucked off a younger man fairly well endowed stepped up behind Carl and slipped his well oiled cock into Carl's ass. At that point the alien in Carl's body took over and minutes later Carl was cumming in one man's mouth while his ass was filled with another man's cum. The alien entered the two bodies attached to Carl, one through the mouth and the other through the penis. The two men immediately felt the change in them as the alien took over two other hosts. Carl moved on and he spotted a very shapely ass on a young man who had a less than average size cock. Carl moved in close and slipped his cock into the shapely ass. The young man groaned as his rectum was stuffed with Carl's big stiff cock. Carl fucked the young man hard and fast and then ejaculated into the tight asshole. The young man felt the large load fill his rectum and he groaned loudly. Carl held the young man to him tightly as he ejaculated and allowed the alien to enter the young man's body. The young man felt his body change as Carl held him tight and filled the young man with semen. The young man could not believe the change in his body as he muscled up and his cock grew in size. The young man watched in amazement as his cock stiffened into an erection that was at least 9" long and 5" around. He could not believe that it was his cock attached to his body. Carl then released the young man and moved on to find other prey. The young man looked at Carl and noticed that Carl's cock didn't go soft. The other two men that had sex with Carl also maintained erections as they moved about the bathhouse. Carl walked into the sauna area and within minutes he had a cock in his mouth and one in his ass while his cock was sucked by another young man. As Carl was occupied in the sauna the other three alien controlled men had entered the orgy room with their 9" erections and they were immediately set upon by a group of men. Back in the sauna the alien was passed from Carl's body to three other men. The four of them sucked and fucked for several minutes before they all ejaculated. Then the three other men sensed the change in their bodies and watched in amazement as their cocks stayed hard and grew in size. By now there were at least eight men walking around with 9" cocks and Carl's reputation had spread throughout the bathhouse. Everyone who had come in contact with Carl experienced a change in their body. They all became thinner, fitter and well endowed. As the night wore on more and more men were infiltrated by the alien and became a host for the visitor. That night no one left the bathhouse as everyone stayed until the sun rose. By the time morning arrived everyone in the bathhouse had been changed forever. Even the attendants had gotten in on the action and they too had engaged in sex and had been taken over by the alien. The news spread quickly among the gay population and soon they were all flocking to the bathhouse. Within weeks every gay person in town had become fitter and well endowed. Sex at the bathhouse became rampart and its reputation spread quickly. Soon other gays from nearby towns came to spend a night in the bathhouse. The orgies became notorious as more and more gays participated in them. Then they would return home and populate their local areas with the aliens. As the word got out several agencies including the space agency began to investigate the strange phenomena. The space agency quickly recognized that the four astronauts were heavily involved in the phenomena and that they might even be responsible for it. The agency then decided to keep a close watch on the former astronauts in their public life. They had already summoned Carl back to headquarters where they planned to run some tests. CHAPTER 06 -- SAM RETURNS TO PRIVATE PRACTICE While the space agency was working on Carl's tests they also kept a close watch on Rachel, Aaron and Sam. The agency knew that Sam had returned to private practice so they observed his patient population. Sam had opened his office in his home town and soon had patients coming to see him for routine medical care. Just the presence of so many naked bodies both men and women were fertile hunting ground for the alien. Sam hired a young attractive girl as his receptionist and another young woman as his nurse. Sam's first mission before he began to see patients was to seduce the two women and pass the alien on to new hosts. The receptionist was a pretty blonde 19 year girl named Pam. She had a nice figure at 34-23-35. She was about 5'7" tall and weighed a fit 105 pounds. The nurse named Melanie was a little shorter than Pam at 5'5" and she weighed in at 100 pounds. Melanie had bleached blonde hair and she had a cute 33-22-33 figure. Sam driven by the alien was immediately attracted to both women and he was anxious to fuck them both. Melanie who was a single mom and needed the job was the most vulnerable and she seemed willing to do what ever it took to keep her job. One evening during the week that they were moving into the office, Sam asked Melanie to stay late and help him with some things. Sam purposely had Melanie put his medical books away and when Melanie stood on the ladder to reach the top shelf, Sam made his move. He smiled as she leaned forward and her white skirt rode up to just below her ass cheeks displaying her beautiful legs encased in the white hose. Sam closed and locked the office door behind him. He walked over to the ladder and gripped it with both hands. "I'll just steady this for you so you don't lose your balance," Sam startled her. "Oh I didn't hear you come in, I'm okay you don't have to hold the ladder," Melanie embarrassingly replied. "No problem at all," Sam said. He looked up the ladder following Melanie's shapely legs up to her panties visible under her short nurse's skirt. Melanie knew that he could see up her skirt and there was nothing she could do about it. She placed the last of the books on the shelf and began her descent down the ladder. As she descended rung by rung, Sam fixed his eyes on the gap between her legs and her panty covered pussy. Melanie was beat red and she gasped out loud when she felt Sam's hands on her legs. "I'll just steady you as you come down," Sam said as his hands slid up her calves. Melanie was trembling and as she stepped down Sam's hands continued to slide up her legs. Sam's hands had moved over her calves to the back of her knees and then up to her thighs to her bare skin. One more step and Sam's hands moved under her skirt and covered her panty covered ass. "Please don't" Melanie weakly protested. She felt Sam slide his hand over her pussy mound and she trembled slightly. She realized that her panties were getting wet just as she heard Sam speak. "Your panties are very wet we should probably take them off so they don't get stained," he offered. Sam peeled her panties off her ass cheeks revealing her beautiful ass. He then pulled them from between her thighs where her legs were pressed together and down to her ankles. Sam had her lift up one foot at a time so that he could remove her panties from her ankles. He slid his hands back up to her ass and massaged it gently complimenting her on the beauty of her legs and ass. Sam slowly turned Melanie around on the ladder so that she faced him. He guided her down a few more rungs pushing her skirt up and exposing her blonde pussy. Sam tenderly stroked Melanie's cunt and slipped a finger into her hole. He tweaked her clit and Melanie grasped the ladder to stabilize herself. Her cunt was soaking wet and she knew that she should call a stop to this but she was afraid it might cost her to lose her job. Melanie decided to let Sam have his way with her. Sam pulled her hips forward and kissed her abdomen. Melanie shivered and trembled as she locked her arms behind the ladder to maintain her balance. Sam kissed all around her pussy before licking her clit and inserting a finger into her cunt. Melanie was going wild as she humped Sam's face with her cunt and he ate her to multiple orgasms. Sam had both hands on her ass as he ate her pussy. The last orgasm caused Melanie to let go of the ladder and she found herself being carried to her desk. Sam laid her on her desk with her legs splayed wide. Melanie watched as he unbuckled his pants and pushed his pants and underwear down to his knees. His huge cock jumped out and Melanie gasped in surprise of its size. Sam lined up his impressive tool with Melanie's quivering twat and eased it in. Sam took his time and kept feeding her more and more of his cock as he fucked her slowly. Melanie was beside herself as she felt her cunt being methodically stretched to accommodate his length and girth. There was no pain but Melanie had never felt fuller in her life. Sam continued to fuck her slowly and soon had the entire 9" buried in her pussy. He made sure to keep his cock in constant contact with her clit and kept her in a constant state of arousal. Melanie was thrashing all over the desk having multiple orgasms. She felt Sam tense up and bury his cock to the hilt in her pussy. He then fired a barrage of cum into her hot pussy and she could feel warm jets of cum hitting the walls of her cunt. The surge of his hot seed caused her to have yet another orgasm. Sam continued to fuck her slowly as they both recovered from their intense orgasms. He slipped his cock from her and remarkably he was still erect. Melanie felt the void in her cunt as his cock left her opening and she could feel his cum trickle down between her thighs. Then she also felt a strange sensation run through her body. Melanie was unaware that the alien had entered her body but she knew something was different. She suddenly felt younger and fitter and her tits strained against her small bra. Sam turned Melanie around so that she was facing down on the desk with her feet on the floor. He eased his still erect cock back into her pussy and fucked her with long deep strokes. Sam pulled her blouse up and unsnapped her bra allowing her tits to spill out into his hands. He gently squeezed her now firm tits and played with her eraser sized hard nipples. "You have the neatest, hardest little nubs," he said as he rolled her nipples in his fingers. Melanie was getting turned on again as he fucked her and played with her. She was startled and her body went stiff when he inserted a well lubed finger in her asshole. Melanie thought to protest but thought better of it and after all it was just a finger. Sam's hands left her tits and he continued to finger fuck her ass as he fucked her pussy. With his other hand he began to tease her clit and soon had her on the verge of another orgasm. Melanie grunted and groaned as Sam fucked her with his big dick, tweaked her clit and reamed her asshole with his finger. She started bucking out of control while having her most intense orgasm ever. Sam took advantage of her orgasmic state and slipped his cock out of her cunt and re-positioned it in her ass. Melanie's thrusting and Sam's continued pressure allowed Sam's cock to enter her asshole. By the time Melanie realized what had happened, Sam had buried the entire 9" in her ass. Melanie was now impaled on his cock and for the first time in her life she was being fucked in the ass. She couldn't understand why she was receptive to such a taboo act but now that she was a host for the alien she had no control of her actions. Melanie just felt full now as any initial pain had subsided. She tried to relax and let him has his way with her. Sam continued to diddle her clit with one hand and tweak her tit nipples with the other as he corn holed her gorgeous ass. Sam loved watching his huge meat slide in and out of her bung hole. He felt another orgasm on the way and buried his cock to the hilt. Melanie could feel his hot cum filling her anal canal to overflowing. As Sam finished shooting his wad he let his softening cock slip out of her asshole. It left her ass with an audible pop and Melanie could feel the cool air enter her channel. She could also feel his cum leaving her asshole and trickling over her cunt lips. She had collapsed on the desk in front of her and was breathing deeply as Sam massaged her ass cheeks as he took in her beauty. Melanie's ass was still clenching as she worked her anal muscles involuntarily and subconsciously ejected his cum from her asshole. Melanie then suddenly wanted to be naked so she stripped off her nurse's uniform and stood naked in the office. Sam then stripped off all of his clothes and as he did Melanie checked out her body in the mirror. She liked what she saw although she did not know how or why her body had changed. Then she spread out over the desk again and beckoned Sam to her. "Fuck me again," she pleaded this time. "My pleasure," Sam said as he moved between her legs and slipped his still hard cock into her pussy. PAM IS NEXT Sam and Melanie fucked for hours that first time and since then Melanie seemed to be horny all the time. They would fuck each day after work and pleasure each other. Still, Sam was driven to seduce Pam and fuck the teenage receptionist. One day Sam invited Pam to dinner where he made sure that she had plenty of wine. After dinner Sam brought Pam back to his house to seduce her. Once in his home Sam led a tipsy Pam into his bedroom. Sam led her over to the bed and hiked her dress up around her waist. He maneuvered her onto the bed and whispered in her ear that he was going to play with her ass. He then removed Pam's panties pulling them off her buttocks slowly as if he were unveiling an art masterpiece. He placed a pillow in front of Pam so that she could place her head on it and as she did she pushed her ass up and arched her back. The giddy Pam was now eager to be pleasured. Before Sam began the seduction he stood behind Pam and took in her marvelous ass, so round, so shapely and so beautiful. Then as Sam knelt on the bed he noticed Pam's face aglow and her eyes wide in anticipation. Sam then began to explore her ass as he began to caress it, massage it and rub her cheeks. He pulled her cheeks apart slightly and revealed her sweet tight aperture. Then he ran a finger over her sensitive little bud and watched it quiver when he touched it. Sam then lowered his head and planted soft tender kisses all over her buttocks. Pam cooed aloud when she felt his lips on her backside. Sam placed both hands on her ass and began to massage her buttocks again. Pam felt the tender but firm deep massage of his fingertips. Sam would push her ass cheeks together and then pull them apart to expose her sweet asshole each time. When he exposed her anus, Pam could feel the cool air on her rosebud. Sam again lowered his mouth to one of her buttocks and pressed his lips against it. Then he blew a steady breath onto Pam's anus and watched as goose bumps covered her skin. He took his time planting well placed kisses on her buttocks and then began a slow torturous journey toward the crack of her ass. Pam smelt so nice and so fresh. Sam's lips then came into contact with the crack in her ass and trailed a line of kisses down to her anus. Pam's body tensed as she was nervous, anxious and excited all at the same time. Sam gently pried her cheeks apart wider exposing her nether hole even more. Then he lowered his lips to her anus and gently kissed it and caressed it with his lips. He repeated this act several times and Pam moaned aloud as her ass was pampered for the first time. Sam then moved lower and kissed the sensitive spot between her asshole and her pussy and Pam groaned again. He then extended his tongue and lightly licked the sensitive area as he continued the journey toward her pussy. Pam flinched at the first contact with her pussy as she was unprepared for that. Sam then began to lick a line from her pussy back to her asshole and then he flicked his tongue across her nether hole. Pam's body gave in to the incredible erotic sensations and craved more attention. Sam took his time and spent many minutes repeating the actions that seemed to turn Pam on. His hands continued to massage her fabulous globes while his lips and tongue explored her asshole. Pam realized how much she like to be kissed, licked and gently nibbled. Her body would twitch and flinch at the long strokes from his tongue and her buttocks would tighten when his tongue probed her anus. Pam lay on the bed and she could feel her heart racing and her chest pounding. Sam then leaned over and whispered to her again and told her how beautiful she looked with her ass pushed up high in the air. Then he began to explore her with his fingers. He placed his index finger on her tailbone and slid it down ever so slowly toward her puckered asshole. He probed gently with the tip of his finger and it fit perfectly in the entrance of her tight hole. Pam tensed up at first and tightened her ass but then she relaxed when she realized that he was going to be gentle. Sam pressed his finger in gently applying a little pressure as his finger entered the outer edge of her anus entering it just ever so slightly. Then he probed a little deeper and wiggled inside Pam's ass. He then removed his finger and Pam felt its absence. Then she felt a cool substance on her anus and she realized that Sam had applied some sort of lubricant to her ass. Pam felt Sam kiss her ass cheeks again and then his finger returned to her asshole and spread the lubricant around the entrance. Pam felt her asshole pucker up as it received the tip of Sam's finger and she wondered how it would feel when he finally put it in her. Her body ached with desire and she realized that she wanted more. She wanted to be touched, penetrated, and filled up and to be explored in her forbidden area. Sam's finger slid in deeper and Pam instinctively clamped her asshole around his finger. Sam held still in her and waited for her to relax before probing deeper. Aliens Use Sex to Invade Humans Ch. 05-07 Sam then wiggled his finger back and forth and let it slide out slowly to the first knuckle. Pam felt his finger slide out and she instinctively clamped her ass around it again, this time to hold it in place. Sam could feel her anal muscles clench his finger as if she were milking it and nursing it. Sam knew the battle that was going on within her body. The sphincter was designed to push things out not pull them in. Each time Pam relaxed her asshole, Sam pushed his finger in deeper until she clamped around it again. This process continued until he entire finger was buried in Pam's ass. With his other hand Sam continued to pay attention to the rest of her ass. His hand wandered all over her shapely buttocks massaging and caressing her soft skin. At the same time he continued to slide his finger in and out of Pam's asshole and he enjoyed watching her anal muscles grip his finger each time. Pam's breathing had become labored and she began to rotate her ass in tiny circles as if to get the finger in deeper. Sam was in no rush as this is exactly what he had planned. He wanted Pam to enjoy every moment of the anal sensations. He wanted to work Pam into a state that she would beg him to fuck her ass or her pussy or both. For now though he was content to worship and devour her hot luscious ass. Sam then lowered his face to her ass and licked her as he probed her with his finger. He took his other hand and reached under her to find her pussy and her clit. As soon as Sam made contact with Pam's hot wet pussy her body trembled as a wave of pleasure passed through her. Sam was very skilled at finding a woman's g-spot and he located Pam's instantly. Between on finger rubbing her g-spot, another diddling her clit and a third finger in her ass, Pam groaned loudly and her body shook with desire. She knew that she was close to her first orgasm. Sam's two fingers in her pussy matched the rhythm of the finger in her ass Pam could feel all the fingers in her separated only by a thin membrane inside her. Sam pumped his fingers in and out and Pam went wild. Sam could feel her body giving itself over to him. It was his now to do as he wished. Her pussy was dripping wet, her ass clamped tight around his finger and her hips pushed back at him but Sam did not want her to explode just yet. Sam suddenly removed his fingers from her holes leaving her empty. Pam screamed for him put them back in her, to fill her up again. Her eyes were wide open and she had a wanton look on her face. Her body was begging to be fucked but Sam was in no hurry. He enjoyed this moment and he savored her dilemma. Sam loved doing this to a woman, teasing her and prolonging her climax. He wanted Pam's anticipation to last as long as possible. Sam then lowered his lips down to her hot ass and planted kisses all over it again. He massaged the smooth white flesh of her ass as he kissed it and Pam cooed. She longed for his fingers to be back in her. Sam moved his mouth directly over her anus and blew on her nether hole. Pam thrust her ass back into Sam's face as if to impale her ass on his tongue. Sam needed no further encouragement and his hands spread her ass open wide so he could probe her asshole. Sam stiffened his tongue like a tiny dick and probed Pam's asshole. He poked his tongue in and out of her ass then he covered her ass completely with his mouth and sucked hard on it. Sam began to lick, nibble and tickle the sensitive rosebud and Pam cried out in passion. "Are you ready to cum, Pam? Do you want me to make you cum?" Sam teased her. "Oh God yes, please make me cum, let me cum," Pam screamed back. It was the first words they had spoken in over an hour. Sam then reached under her again and located her clit. Pam's pussy was sopping wet and Sam knew she was very close to a climax. He played with her puffy pussy lips as she diddled her clit and then he pushed first one, then two and finally three fingers into her pussy. Sam then pulled his mouth off her assed and pushed two fingers from his other hand into Pam's snug asshole. Pam gasped and swallowed hard at the new invasion in her ass but her state of desire and the lubrication facilitated the extra digit. Sam now had three fingers in her pussy and two in her ass as he picked up the rhythm. The thrusts became deep and hard as he relished with the delight of devouring her ass and pussy with his fingers. Pam responded by pushing her ass back against his hands as she fucked back at them. "That's it Pam, fuck back, fuck my fingers in your holes," Sam called out to her. Sam finger fucked her two holes with both hands as Pam pushed back against him. He could feel the small patch of skin separating the three fingers in her pussy from the two in her asshole. Sam was getting carried away and he began to furiously fuck her lovely hungry body with his fingers. Then it happened and Pam exploded. She clamped down on the fingers in her body and her pussy spasmed as a massive orgasm rocked her. Pam screamed out loud with her mind blowing climax. Sam pulled his fingers from her asshole and replaced them with his mouth. He could feel the hot moisture in Pam's pussy as it coated his fingers. Sam continued to lick her quivering asshole as her first orgasm subsided but hen another orgasm rocked Pam's body. This one seemed even more intense than the first and it caught them both by surprise. Sam kept his mouth on Pam's ass until the second orgasm had passed and she seemed to recover. With one last kiss on her cute little rosebud, Sam lifted himself up and looked at the beautiful Pam. She had her head turned to one side on the pillow with a look of pure lust and gratitude in her eyes. Sam then stood up and removed all his clothes and for the first time Pam saw his cock and she was intimidated by the size. Sam moved around the bed and removed Pam's clothes so that she was completely naked now. He gently squeezed her big tits and tweaked her hard erect nipples as he complimented her on her figure. Sam had Pam remain in the same position on the bed and then he caressed her curvy ass again. "I want to fuck you in the ass Pam. Do you want me to fuck your hot ass? I can see that your ass is asking to be fucked." "Sam, I'm not sure, it's not right," Pam said nervously but she knew she had come this far and Sam would not take no for an answer. Sam poured more lubricant on her ass and worked it into her asshole. Pam arched her back and pointed her beautiful ass back at him. He coated her asshole with a generous amount of oil and slid his thick finger back in her hole. He took his time preparing her ass relishing every moment. He then coated his entire cock with the oil and placed the head at the entrance to her anus. Sam pushed forward and the thick cock head squeezed into Pam's tight asshole. Sam withdrew his cock head and then pushed it back in this time causing more pleasure than pain. He pushed until a couple of inches were in her ass. Pam found her self holding her breath and her body was covered in goose bumps. Sam was so thick that her asshole stretched to new dimensions and held his cock in a vice like grip. Sam slowly slid his dick in and out of her each time going a little deeper. Pam pushed back as if she were trying to poop as she knew that would make the penetration easier. Pam's brief pain had subsided and it was replaced with a feeling of fullness. Pam relaxed a little and then felt more of Sam's cock slide into her asshole. She grunted out loud as she felt fuller and then a wave of pleasure passed through her body. She was convinced that Sam had his whole cock in her now but really he only had about half of his big dick in her. She felt so full so had no idea that he had about another four inches before he was done. Sam kept adding more and more of his cock to her ass. There was discomfort then fullness and then pleasure each time he went deeper. Pam would tense, relax and then enjoy it. This pattern continued until Sam had his whole cock buried in Pam's ass. Sam reached around and played with her clit as he pounded her ass. Her pussy and asshole were on fire as the big cock reached previously untouched areas in her body. Pam was on the brink of another huge orgasm as Sam methodically fucked her in her tight anus with his sizeable cock. He loved watching his cock slide out of Pam's shapely ass and then plunge back in as his hips slapped against her curvy ass cheeks causing them to jiggle with each thrust. Her orgasm surged within her as he fucked her ass harder and faster. As Pam came and came her entire body went into spasm. Her pussy convulsed and clamped around Sam's fingers coating them with her cunt juice. Pam's asshole pulsated as Sam drove his big cock in and out of it. Her ass involuntarily squeezed and released his huge member as he fucked it causing him to finally lose it. Sam slid his pecker deep into Pam's rectum as his cock spasmed and sent a thick stream of hot cum into her channel. Sam kept fucking her as load after load was fired into her ass. His cock kept twitching and spurting inside the impaled Pam. Pam had never felt so full of cum and there was no where for it to go, blocked by Sam's swollen cock buried in her ass. He slowed his pace and eventually stopped allowing his cock to remain buried in Pam's ass. He did not go soft right away and he gently moved his hips pushing cum around in her ass. Some of it trickled out and ran down over her pussy lips. Pam then felt a strange feeling that something was happening to her body. Her tits all of sudden seemed firmer and there was a fire in her pussy. Sam stopped and slowly withdrew his cock from her loosened asshole. He marveled in the sight of his impressive cock sliding out of Pam's shapely ass. His man seed flowed from her asshole and ran like a river down over her pussy and between her sweet thighs. Sam and Pam stayed in the same position for awhile and he massaged her beautiful ass as she remained on her knees with her ass perched in the air. Sam pushed down lightly on Pam's back causing her to accentuate her ass even more. He loved looking at it and playing with it as she cooed into the pillow. Sam's cock remained hard and looked menacing around Pam's asshole. He was thrilled that he finally fucked her beautiful tight ass. Pam looked magnificent with her just fucked curvy ass in the air. Sam could not resist sticking one of his fingers in her asshole and she just wiggled her bum instinctively. Pam then rolled over on her back and Sam moved between her legs. Sam slipped his still hard cock into Pam's pussy and they fucked like rabbits. Pam had countless orgasms and Sam ejaculated in her pussy numerous times. Then Sam had to have Pam's ass one more time and she willingly moved back to all fours. Now that the alien possessed both Pam's and Melanie's bodies, Sam would focus on his patients. Pam and Melanie would assist in the seduction of many patients and the alien population would continue to spread. CHAPTER 07 -- THE ALIEN POPULATION CONTINUES TO GROW The aliens continued to acquire hosts at a rapid pace and they controlled almost the entire towns where the four astronauts lived. Incest was rampant among families and the high schools and colleges had daily orgies on campus with students and teachers. The space agency was now convinced that the astronauts had returned infected with a strange virus. Carl had been summoned to the space station for tests and he was under quarantine. The agency director decided to experiment with some human contact and had selected a young man from the agency to interact with Carl. Suspicious that Carl would try to seduce whomever he came in contact with, the director selected a young effeminate looking man known to be gay. The interaction went according to plan as the agency team observed Carl and the young man Roger together. Roger had expected to conduct an interview with Carl but he had no idea of what Carl was capable of. Roger was putty in Carl's hands and in no time they were both naked in the exam room. Carl guided Roger over to the exam bed and had him kneel down on all fours. Then Carl knelt behind Roger and he began to caress Roger's beautiful ass. Roger's body was delicate, hairless and flawless. As he sawed his fingers in and out of Roger's anus Carl was getting turned on as the alien directed him to bury his cock in the shapely ass. He moved closer to Roger and lined up the head of his cock with Roger's anal opening and began to ease it into to him. Carl spat on his hand and rubbed his saliva all over his cock which made it very slick. Carl's cock head cleared Roger's sphincter and it slid right in without resistance. Roger's ass chute was warm and tight as Carl went deep into him. If Roger ever felt any pain he never let on that he did. Carl was all the way in Roger's ass and he started a slow fucking motion. Carl continued to pump Roger's ass with deep, long, deliberate thrusts as he caressed the smooth round ass. Roger asked Carl to fuck him harder and quicker. So Carl picked up the pace and he started pounding Roger's ass faster and faster. Carl's balls started bouncing off of his Roger's balls and Roger was moaning with each thrust of cock. Carl could feel his climax building and he knew that any moment he would shoot his seed in Roger's ass. Carl tried to make it last as long as possible but once Roger started to contract his anal muscles Carl lost it. Carl fired a barrage of cum into Roger's ass filling it to overflowing. As he continued to fuck Roger, Carl's cum backed up in Roger's rectum and began to ooze out flowing over their balls. Roger used his talented anal muscles to milk Carl's cock and drain it of all his seed. Carl didn't think that his cock would ever be soft again as he remained hard in Roger's tight sheath. Roger's milking action weakened him and Carl collapsed on top of Roger's body. Roger flattened out on the bed with Carl on top and Carl's cock still in his Roger's ass. Carl rolled off of him and his hard cock slipped from Roger's ass. Roger rolled to his back and spread his legs lifting his knees to his chest. The alien had now entered Roger's body and was in control of the host. "Fuck me again," Roger begged. Carl moved between Roger's legs much like he would fuck a woman and lined up his still erect cock with Roger's asshole. Roger was also as hard as a rock and his beautiful cock pointed toward his head. Carl pressed slightly forward and his cock moved into Roger's hot ass again. Roger's ass actually pulled Carl inside and the cock went all the way into Roger's ass as Carl's balls rested on Roger's ass. Roger than gasped in surprise as he felt his body change and he watched his cock grow right in front of his eyes. Roger stared in disbelief at his cock as it grew from his average 6 inches to a thick 9 inches. The agency team also watched in awe as Roger's body changed right in front of them. "God, that feels so good, fuck me," Roger cried out. Roger's ass lifted off the bed and Carl's cock was fully embedded in it. Carl pulled back a little and pushed forward. Roger groaned as Carl began to slowly fuck him, each time taking a longer stroke. Carl's cock head would come out to the edge of Roger's asshole before he pushed it back in. Their fucking was making a sucking sound. Each time Carl's balls slammed against his nurse's ass, his body and Roger's ass made a wet slapping sound. Carl was so fucking hot that he crammed his cock fully into Roger. Roger held Carl's cock and massaged it with his anal muscles; Carl knew he was not going to last very long even though he had already cum. Roger humped up against Carl fucking him back as Carl fucked him. Their room smelled of sex and sweat. Carl reached down to stroke Roger's cock but Roger grabbed his wrist. "No, I want to cum just from you fucking me," he said and pushed the hand away, "Just keep fucking me." Carl took slow long strokes in and out of Roger's ass as Roger pushed up into him more and more. Soon Roger took control and just fucked Carl's cock. Carl let Roger fuck him with his ass muscles. Carl's actions became more erratic and his thrusts shorter and more powerful. Roger was grunting as Carl's cock slid in and out of his hot ass. Soon Carl's cock was barely staying in Roger's ass. Then Roger slowed down and let the cock just press against his prostate. Roger announced that he was cumming. Carl felt Roger's cum shoot between their bodies covering their chests and abs and then oozing out around their pubes. Carl slammed his cock into his Roger's loose wet hole and he felt his balls tighten again. Carl pressed deep into him and his seed filled Roger's ass. "Yes cum in my ass again. Oh I feel it, I feel your hot juice," Roger groaned. Carl pulled, pushed and cum spurted into Roger making his hole wetter and warmer as Carl's cock easily slid in. Carl continued fucking him until his legs were weak and he stopped cumming. Carl's cock slipped from Roger's ass and remarkably they were both still hard. The agency observed the action between Carl and Roger as the two men seemed insatiable and fucked for hours. The agency had part of the answer now as it was confirmed that the virus was transmitted by sexual intercourse. Now that they knew how it was spread among humans they had to figure out how to kill the virus. The rest of that day they would put their heads together and try to determine how to deal with the alien virus. THE SPREAD OF THE ALIENS IS SOLVED Sam and his assistants, Pam and Melanie had been successful in seducing both men and women and spreading the alien to new hosts. Pam and Melanie had no trouble seducing the male patients who loved fucking the hot women and loved the change in their bodies. The male patients would go home after the doctor's visit and they would fuck their wives, girlfriends and daughters spreading the alien to more and more hosts. Sam was successful seducing many of the women patients and they loved the change in their bodies. They too would return home and fuck their husbands, boyfriends and sons also spreading the alien population. A few times Sam encountered a gay patient but he had no trouble getting the patients to suck his cock or accept his cock in their asses. The population was getting fitter and hornier every day. The women were looking beautiful with their firm bodies and perfect shapes. The men were fitter and they were all well endowed and had developed an incredible capacity for sex. The space agency then called Aaron, Sam and Rachel back to headquarters and quarantined them so that they could be observed. The team studying the issue closely determined that prolonged exposure to the sun might just be the solution so they arranged a test case. Carl was escorted to the beach accompanied by a handsome young man named Fred. As they sat on the beach the alien began to take control and directed Carl to seduce Fred. Carl began to make advances toward Fred who was not gay. Fred tried to avoid the advances but Carl was insistent. At one point Carl whipped his swim suit down to his knees and his big thick nine inch cock sprung out. Fred moved away but Carl jumped on him, pinned him to the sand and ripped Fred's bathing suit from his body. Fred screamed for help as Carl tried to shove his cock into Fred's ass. However with his anus dry and taut, Carl could not penetrate Fred's asshole. Carl then reached for the suntan lotion to use it to lubricate Fred's asshole but as he did Fred was able to break free. Fred ran into the ocean as he was an excellent swimmer. Fred's swimsuit fell from his body as the naked Fred dashed into the water. Carl grabbed the lube, kicked off his swim suit and chased after Fred. The onlookers were shocked to see the two naked men running toward the ocean particularly with Carl's big dick bobbing in front of him. Fred had cleared the breakers and was swimming steadily away as Carl hit the water. Carl cleared the breakers and then his body went limp. Aliens Use Sex to Invade Humans Ch. 05-07 All of a sudden Carl had no energy and he felt his body change. He started to feel ill so he turned back and left the water. Carl then realized that his body had returned to its original form before the alien had taken over. His cock shriveled and became soft as it returned to his average size six inches. His paunch reappeared and he definitely felt older and out of shape. Fred stayed in the water and watched as the change came over Carl. Just then the authorities arrived to arrest Carl and Fred for nudity on a public beach. The two of them were taken into custody and transported to the local police station. Fred notified the agency about what happened and where they were being held. Representatives from the space agency arranged for Fred and Carl to be released into their custody and returned them to headquarters. To assure that it was not an isolated case the agency had Aaron, Sam and Rachel exposed to sea water. The results were the same as the three astronauts also returned to normal. The agency then put a task force together and arranged for all areas known to be exposed to the alien virus to be treated with pure and simple seawater. In time all populations returned to normal and the alien virus had been eliminated. The agency would then make sure that all astronauts returning from the space station would be decontaminated with seawater along with the normal procedure. It had been quite a scare for the agency and the populace. Who could ever imagine what the planet would have become if a cure had not been found? Would have the people been happier with fit bodies, big cocks and insatiable sexual appetites? We will never know.