(Brief summary: Gumball and Penny spend some time, only for Gumball to be the bottom.)
It was no secret that Gumball Watterson loves his girlfriend Penny Fitzgerald. I mean, it was all out there and whenever he's near her or talks to her, he's all tongue tied and giddy like a school girl. Ever since he helped her coming out of her shell, figuratively and literally, they've been close.
They've been closer to a year now and they wanted to make this special. But Gumball had no idea what to do. Thankfully, Penny had the perfect idea in mind for their 1 year anniversary of being together.
Of course, she was going to surprise her feline boyfriend and she knows the perfect way. Summer vacation was coming up, which meant they had all the time in the world to do whatever the hell they wanted, which was good enough for Gumball.
One day, when Summer vacation started, they kissed each other as they walked away from school.
"So, Penny. Did you have anything planned for our anniversary?" Gumball asked her as they held each other's hands.
"Oh, I have some ideas. I'm not sure your on board with it though-" She started before was interrupted by the cat boy.
"Whatever it is, I love it! We can do it at my house. The rest of the family had something planned or whatever. I'm not really interested. I just wanna be with you~" Gumball says and gives a cute smile, his cheeks flushing.
Penny couldn't help but giggle, as Gumball tried very hard to be the 'manly man', yeah, he was pretty much a marshmallow. Either way, they were both looking forward to it. The day finally came as Gumball's family were going away for a couple of weeks, which leaves them plenty of time to do whatever they want.
After bidding farewell and watching the car leave, the two looked at each other with mischievous smiles and head inside, locking the door. They had the whole house to themselves! Penny had noticed that Gumball was quite feminine in his appearance, right down to his waist. Must have gotten from his mother's genes.
Either way, he was still adorable~ However, Gumball was still wracking his brain over what they could do. He really didn't have many ideas as he never thought he would get this far in a relationship and one with such a cool person like Penny in his opinion.
"What do we do now, Penny? I honestly have no idea what to do. I'm sorry. I must be a lousy boyfriend." Gumball says sadly, his ears folding back.
"It's okay, Gumball. You've never done this before. However... I have an idea on how to spice things up~" The shapeshifter says and smiles.
That caught Gumball's attention and looked rather curious, not knowing what she has planned for the both of them.
"Spicing things up, how?" He then gave a gasp and his eyes widened in realization. "A-are we... gonna do it?" He saw Penny nod and his cheeks flushing a deep red.
"I'm sure you'll love it, Gumball. I know I will~" Penny says and giggles. Gumball started taking off his clothes, removing his sweater, sweatpants and his underwear. And the shapeshifter was right, his curvy and feminine figure was definitely his mother's side.
She also noticed that although his balls were normal and decent sized, his penis was rather... small. But it shouldn't matter for what she had planned for him. Gumball seems to have noticed and blushes.
"I... I'm not very big, Penny. I dunno what to do. I wanna make you happy." The blue furred feline says, Penny cups his cheek and he begins to smile, purring and leaning into it.
"Don't worry, there's another way we can fun~" She reassures him. Penny starts taking off her clothes. Discarding her t-shirt and shorts.
Gumball admired everything about her. Her voluptuous body, her curvy figure, those perky breasts and nipples, her cute and kind voice, her penis that is throbbing... wait. Back up. Penis throbbing?
Gumball snapped out of whatever daze he was in and looked at Penny's crotch, his eyes wide in shock. He looks at the length, then back to Penny. He was honestly not expecting this. Hell, her's was way bigger this own!
"... WHAT THE WHAT?! Penny... penis... you... HUH??????" The cat boy was so confused right now, had he been dating a hermaphrodite? Or whatever? Not that he has a problem with that, he found he swung both ways. Which was interesting, but back to the point. "What's going on?! How come I didn't notice?!"
Penny couldn't help but giggle as Gumball's reaction. Of course, she expected him to react this way. "Surprised, Gumball?~" She asked as she swayed her dick back and forth. Almost as if she was hypnotizing her boyfriend.
"B-But, why didn't you tell me?!" He exclaimed. This begged the question… What other secrets was Penny hiding from him?
"Since you helped me come out of my shell, I went through some stuff, and I decided to become a hermaphrodite." She casually explained as if this was normal for her. "Besides, Darwin told me that you're bisexual, sooo…"
Darwin? His own adopted brother?? He was gonna have a few words with him when his family returned…
Gumball tried to avert his eyes, but… Something about the way Penny's cock looked was turning him on. And unfortunately for him, she noticed this. "Be honest now; do you like it?~"
"I-I mean… It is a nice cock…" Said Gumball. Mentally kicking himself for saying that out loud. "I had some fantasies, but… I've never really tried it out until now."
"Is that so?" Asked Penny before giggling. "Hehe! Why don't you tell me about these 'fantasies' of yours?"
"I-I mean... I sometimes have fantasies of some guy, like... I dunno... do it to me. S-sucking them off and using my butt..." Gumball admitted with a deep red blush, he felt like crawling into a hole and die of embarrassment.
"Really now? Well, what if we do that for real? I can help make those a reality with this~" Penny says and sways her dick some more.
"But, uh... ahahah... t-thing is... I never actually done it before." Gumball nervously laughs, he eyed his girlfriend's dick, almost mesmorized by it. It was so much bigger than his, it wasn't funny.
"Don't worry, Gumball. We can both be happy together!  The shapeshifter reassures the cat boy. She sits on the couch and gives her boyfriend a smile. "Get on your knees~"
And for some reason, Gumball found that hot and obeyed. He was on his knees, staring at the large length before him. It was so big and thick! Could he even take this? If it was for Penny... he would do it. He opens his mouth and gives the shaft a lick.
"Mmf!" Penny moaned. "That's it, keep going!"
Gumball just obeyed and kept licking his girlfriend's dick. …Man, that sounded weird, but her cock tasted pretty good. He had a lot of conflicting feelings right now.
As Gumball continued licking, Penny placed a hand on the back of the cat boy's head. "Ready for the next step~?" She asked sensually.
'Next step?' Thought Gumball. Slightly nervous as to what Penny meant by that.
Without warning, Penny forced her dick into Gumball's mouth. "Aah! Take my cock, Gumball!" She moaned loudly.
Needless to say, Gumball was shocked at how forceful Penny was being. In fact… Was she always liked this? Or was she showing her true colors in this moment?
'She's really going for it!' He thought as he Penny facefucked him.
Gumball gave out a choked gurgle as he felt Penny shoving him deeper around her cock. All the feline could do was take it as he tasted her length.
'S-she's going... s-so rough!' Gumball thought as he gave out muffled groans.
"Mmh... that's it, Gumball...! You like the taste don't you? How does it feel to taste a real cock?~" Penny moans out, pushing her boyfriend's head on her shaft, getting turned on at seeing his shocked expression and hearing his moans.
Even his own body started betraying him. His cock twitched at how good this felt. Gumball places his paws on Penny's lap for support as tears appeared in the corner of his eyes. He had never done this before in his life! It was really Penny doing all the work.
'S-so... girthy! Has she always been this... dominant? That's kinda hot... in a weird way.' He blushes at the thought and could taste some pre, as she moved and face fucked him faster.
"I'm gonna cum!" Penny moaned before going even harder.
With one last thrust, Penny came down Gumball's throat. The blue cat letting out a gurgled moan as it happened.
'Th-There's so much!' He thought as his stomach began bulging ever so slightly.
Once she was finished, Penny pulled away and stained Gumball's face with the rest of her cum. Once she pulled away, Gumball took some deep breaths and coughed a bit.
"Holy shit~" Gumball panted. "That was so… So…"
"So what?" Asked Penny. Eager to hear his response.
"So… Good~" Gumball replied as hearts appeared in his eyes. Penny smiled lewdly at this.
"I concur!" She said. "Now show me that blue bubble butt, cutie~"
Gumball obliged and got onto the couch. Shaking his plump ass in Penny's direction. "D-Do it, Penny~" He begged. Really getting into it. "Shive your cock in my fat ass!"
Penny couldn't take her eyes off the sight before her. How did she not notice how plump her boyfriend's ass was? Definitely his mother's genes.
"You want it? here it is!" Penny shouted and shoves her cock inside Gumball's asshole. He gave a girlish cry before he let out a shaky moan.
"A-a-aahh... P-Penny...!~ O-oh God, your cock's so big...!~" Gumball placed his arms over the couch for support as he felt his girlfriend bucking into him. "Hhnh!~ O-oohh!~"
"Mmmm... yeah... you like my cock inside your little ass pussy, Gummypuss?~" Penny teases him, using that nickname his mother uses sometimes. She gave his ass a spank and heard him squeal. "Well?!"
"Y-yeah...! I like it! Please... please don't... s-stop! Oh God, oh God, oh God...!~" Gumball moans out, he never expected to feel this good! Why didn't he do this before?! Thank goodness Penny was there to teach him the right way. This is what a boyfriend and girlfriend does, right?
'Yeah... this is what they do~ If Penny thinks this is natural... then I'll do it to make her happy~' Gumball thought, not realizing this was a little odd. But the pleasure was overriding his thoughts.
"You have the best ass ever, Gumball~ It's criminal how you haven't been fucked before until now! Don't worry, as your girlfriend, I'll fix that soon!" Penny chuckles and gives her feline lover another spank on his rear.
"Aah!~ T-thank you, Penny! I'll be the best boyfriend ever! More!!~ Mreooww...!~" Gumball has a dumb smile on his face, his small dick twitching and leaking pre from the abuse as he felt Penny going faster and rougher.
Penny reached down and began jerking Gumball off. This caused him to let out a loud moan as he felt both his cock and ass being pleasured at the same time.
"Oh God…! This feels so fucking good~" He groaned loudly before he came. Staining the couch.
Penny was honestly impressed~ Who knew someone with a small dick could cum so hard? Seeing Gumball cum was making Penny leak pre. "I'm so close! You want my cum, Gummypuss!?" She asked before slapping her boyfriend's ass.
"Ah! Y-Yeeees~" Gumball moaned. "Cum inside of me, Penny! Fill me up!"
That was all she needed to hear! After a couple more hard thrusts, Penny came deep inside Gumball. "AAGH! TAKE IT, GUMBALL!!" She screamed.
Gumball's eyes rolled back and his tongue flopped out of his mouth. Feeling Penny's cum inside him felt heavenly! Screw masturbation; this was so much better!
Penny eventually stopped cumming and pulled out. Staining Gumball's ass with the rest of her cum. Once that was said and done, she flopped down next to the slutty feline. Hearing him purr happily.
"Penny...~" Gumball sighs happily, not caring of the mess they made. This was the best experience he's ever had!
"Glad you enjoyed that, Gumball~" The shapeshifter says and chuckles, she strokes Gumball's head and heard him purring in content. Her boyfriend was slutty AND adorable~ Which also gave her another idea. "Say, Gummypuss..."
"Mmmmh... mh?" He stopped and stared at her.
"How about doing something more... risqué?" She asked him, to which the blue furred feline got curious.
"Like what?" He replied as he felt her scratching behind his ear, making him purr again and smile.
"Something like... a little exhibitionism." She suggested and gave a lewd smile.
"Exhi-whats-it?" Gumball said, not hearing that word before and mentally cursing himself for sounding so dumb. But Penny giggles and explains anyways.
"It means, doing perverted acts in a plublic space. That kind of thing." She told him, and now Gumball understood and felt very shy.
"I-I dunno... what if we get caught?" He said in a small voice, he was then lured by his girlfriend's cock again and a switch had been flipped.
"You get to have more of this~" She teases him, as Gumball could smell the leftover cum and musk.
"... O-okay... if it's for you. I'll do it~ I kinda like it anyways~" The feline femboy accepted without a second thought, Penny smiles at that and made him kiss her length.
"Good. I know just the place... but first..." Penny gets up for a moment and leaves the room, making Gumball wondering what she was doing. She then returned with a marker and a devilish smile on her normally cute face. "Let's get you prepped up~"
[LATER ON…]
Here they were at Elmore Park. About to do such an obscene act in broad daylight! The reason as to why Penny needed the marker? She'd written the word 'SLUT' on Gumball's forehead.
Thankfully for the both of them, the park was vacant of anyone save for a few stray animals. Penny found a park bench and sat down on it. "Ready, Gumball?~" She asked.
"Y-Yes, Penny~" Gumball replied.
"Ah, ah, ah!" She teased with a way of the finger. "It's 'Mistress', remember?"
"Oh, right. Eheheh~ Sorry, Mistress." He replied sheepishly.
Penny spread her legs and allowed Gumball to lower himself onto her dick. "Aaaahn~" He moaned loudly. Not caring if they were out in the open.
"Go for it, Gummypuss; please your Mistress!" Penny commanded.
Gumball began bouncing up and down the shapeshifter's length. Both of them moaning and groaning all the while. A few bystanders who just so happened to pass by watched for a little bit, but ultimately continued on with their day.
Gumball could barely believe this was happening. They were having sex, in public! To anyone who stumbles on them!
"Aaah!~ Hhah... M-Mistress...!~ You're cock feels so good inside me...!~" Gumball moans out, moving his hips as he rode his girlfriend's cock. "D-doing this in public...! Hhahnh!~ F-fuck...!~"
"It feels good, doesn't it? Just imagine what people are thinking when they see you, riding my dick like the shamless femboy, submissive little boy bithc slut you are!~" Penny says, and watches as the feline shudders from the name calling.
'P-people... are watching... out in the open... me being a sissy slut...! Being in a relationship is awesome!~' Gumball's mind was getting all twisted, he didn't attempt to keep himself quiet. He rode Penny's cock with a stupid smile on his face, tongue sticking out and panting like he's running a marathon.
"P-Penny... M-my Mistress...! I'll do anything to make you happy...! Anything!~" The feline femboy panted out, his moans could be heard around the park.
"Anything? Anything at all?~" She tested him, making sure he meant it, Gumball nodded and felt Penny hitting his prostate letting out a girlish moan.
"Aahn!~ A-aaaanything!~ Oh fuck, hit it again!~" He lets out a spurt of cum, not caring if anyone was judging him or not. There were the occasional passerby's, but they either ignored them or made some passing comment on Gumball.
This gave Penny an idea. "Become my pet, Gumball! Give me pleasure whenever I ask for it!" She moaned as she began leaking pre.
Gumball nodded vigorously. "Y-Yes, Mistress! I'll be your pet!" He shouted. Not giving a single shit that someone might catch them. He was also getting close. "I'm gonna cum! Please, let me cum, Mistress!"
"Permission granted!" She exclaimed before, with another harsh thrust against his prostate, came inside of Gumball as he came as well. The two of them screaming in pleasure as it all happened.
Penny pulled out and allowed Gumball to flop on top of her. "Hah… So gooood~" Gumball sighed. "I love you, Mistress…!"
Penny giggled at how raunchy the previously-shy cat boy had become. "I love you too, Gummypuss~" She breathed before picking him up and carrying him home. Of course, this was only the beginning…
[…]
As she promised that day, Penny made Gumball her new pet. And she had bought something for him, too: A French maid outfit which he proudly wore whenever they were together.
Gumball had changed his attire entirely, now solely wearing feminine clothing. He's been doing it for so long, that he treated this as normal, his mind giving into lust and being the obedient pet he is. And true to Penny's word, they pretty much did their business anywhere at any time. The feline dropping everything to please his Mistress.
It had been a week since then and they still had the house to themselves before Gumball's family returns. Gumball was lying on the table, as Penny fucked him with no care in the world, watching as Gumball was moaning like the sissy fuckboy he truly is. His small cock twitching.
"Aahn!~ Hha!~ Mistress!~ Mistress!!~ Fuck me forever!~ Let this pet please you!~ I love you, Penny!~" He cried out, not caring if anyone heard him, he stopped caring a long time ago. Let the world hear his whoreish moans!
"That's a good pet, Gummypuss...~ I wonder if we should show your family the new you when they come back. Won't they be in for a surprise!~" Penny says and laughs, she hit his prostate again and gave a feminine squeal.
"Y-yess...!~ I wanna show them the love you've given me!~ A-anything for you, Mistress...~" It was official, Gumball's mind had snapped.
They even did it in public places as well, not just at the park. The local bathrooms, some parts of the neighborhood and even at school. Gumball was the luckiest boyfriend in all of Elmore~ As Penny filled Gumball up yet again, she leaned down and they sloppily made out.
This was the best anniversary ever~ And it would go on, and on, and on, and on...~
END