Chapter 9: Growing up 

--Disclaimer---
This story is entirely fictional and doesn't/shouldn't represent any real life situations. It is strictly for entertainment purposes.

The little holiday house was perfect. It was nestled in a dense patch of trees on a secluded island away from prying eyes. After another crazy mission beating up robots and saving animals, Tails desperately wanted some time alone with Sonic. After weeks of research he finally found the perfect location. A luxury private cottage for a romantic weekend getaway. Sonic couldn’t believe how perfect everything was. From the adventurous woodlands to run through, to the details inside the cottage, he was impressed with what his foxy boyfriend had done for him.

“So what do you think, Sonic?” Tails asked as they both slipped their shoes off by the door. 

“This place is great, little buddy! What did you wanna do first?”

“Well,” Tails giggled, stepping close to Sonic and looking up at him. “I was thinking about fucking you right here against the wall.” 

“Haha, wha…HRMPH!” Sonic was taken off guard as Tails pushed him against the wall and kissed him. First with wide eyes. The slowly lowering lids, Sonic wrapped his arms around Tails’ waist receiving the fox's advance. 
Tails ran both hands up Sonic's chest fur, around the back of his head, and through his soft quills. Their tongues rolled together sharing a playful exchange. 

“Mwah! Hehe,” Tails giggled, breaking from the kiss. “Sorry Sonic, I couldn't resist. You're just so sexy.” Tails ran his right hand down Sonic's backside and wrapped his fingers around the hedgehog's tail. Rubbing its base the young fox smiled. Then slowly reaching toward Sonic's front with his left, Tails placed his palm over the tuft of blue pubic fur. 

“AH, Tails,” Sonic gasped. “A…are we really doing this here?” 

“Did you have something else in mind?” 

“Well,” Sonic glanced to the side as Tails rubbed through his fur, finding the hero's yip starting to poke out. “I did see that big jacuzzi tub when I was running around. How about…MMMPH.” Tails kissed him again. 

“Sounds fun, let's go.”

Tails quickly pulled Sonic's wrist and they ran to the bathroom. Starting the water, the two slowly began undressing. A slip of each shoe, the gloves falling into each of them, and each sock soon followed. They couldn't help but watch the other as they got naked. Finally all exposed, they turned to one another smiling. Both of them were semi-hard now, and quickly growing. Sonic's tapered hedgehog cock was an impressive 8 inches at full mast. Normally hidden in a fur covered slit, he was more than well endowed for a mobian. 
Tails, though smaller, sported a simple knotted red rocket tucked away in a golden furred sheath. Though he was always more exposed than Sonic, the young fox was still small enough that it wasn't a big deal. Though now a solid 4 inches while hard and knot exposed to the air, there was nothing at all to hide. 

“Damn little buddy, you're so hot!” Sonic said, turning off the water as the tub filled. 

“Hehe, you too Sonic. Come on.” Tails stepped into the warm water and turned on the bubbles. A rush of jets created a slow but rolling foam on the surface. Sitting across from each other, the two boys held hands and eased close for a kiss.

“Mmmm. Hmmmmm. Mmmmm…Mwah!” 

As their tongues danced together, Tails wiggled closer to Sonic until their dicks touched. Giggling, Tails reached down and grabbed them together stroking them. Sonic moaned which let the young fox slip his tongue back together for another kiss. The rush of water around their bodies plus the simple frotting was a perfect start to their weekend. 

“Huff, huff, T…Tails.” Sonic moaned, his stiffness being squeezed tight with the fox. 

“Hehe, you like it when our dicks rub like this?”

“Y…yeah,” Sonic replied blushing. “I…it feels so good.” 

“I feel g…good too,” Tails said, panting. “But I…huff…need more.” 
Letting his hand go he stood up. In the rushing water his cock bobbed just on the surface, continuing to be pleasured. Sonic in a lust filled daze, looked up at Tails. 
“Turn around and lean on the edge, it's time.” 

Sonic gulped recognizing the commanding tone in his young lover's voice. While the idea of getting pinned to the wall earlier should have been a dead giveaway, he wasn't expecting Tails to be so demanding. Though when the fox gets aggressively horny, it is always best to submit. Not that Sonic minded that much. He was really turned on by how the normally shy fox gets when he's in the mood…and being a growing boy he was in the mood a lot. 
Standing up, Sonic leaned his elbows against the edge of the tub and lifted his tail exposing his tailhole. 
“Like this little buddy?”

“Perfect.” Tails bit his lower lip and grabbed the base of his cock. Rubbing his knot, and tugging his sheath all the way back he stepped toward Sonic. With his left hand he caressed Sonic's ass, spreading his cheek out for an easier entrance. Taking the tip of his boyhood he rubbed across the blue hedgehog's hole. 
“You ready, Sonic?”

“Yeah.”

“What's that? I wanna hear you say it.” 

Sonic whimpered from the embarrassment. Giving himself over to the younger boy he knew he had to sacrifice his pride if he wanted Tails inside. 
“Fuck me little buddy. Please.”

“Hehe, good boy,” Tails giggled and pressed his yip firmly against Sonic, slipping inside. 

Both boys gasped as Sonic's body enveloped the young fox's cock. Tails wasted no time plunging his entire 4 inches inside the quivering hedgehog's ass. Even his half swollen knot popped in with ease. It seemed the warm rushing water had certainly loosened his older lover up. Grabbing Sonic’s hips with both hands, Tails began thrusting his knot in and out of Sonic’s sensitive tailhole. 

PLAP PLAP PLAP PLAP PLAP PLAP 

Sonic's ass was so amazing. It was loose enough for the fox to pump his cock in and out with ease, but still plenty tight for riding the waves of pleasure as well. Sonic moaned as Tails’ cock prodded and rubbed hard against his prostate. Like tickling his cock from the inside, Sonic could feel every pulsing thrust. His own 8 inches flopped up and down grazing the water's edge with each cycle. It was pure bliss!

PLAP PLAP PLAP PLAP PLAP PLAP 

The two boys breathed heavily and moaned for what felt like an eternity. Tails 2as normally quick to a first orgasm, but to Sonic's surprise he just kept going. Thrust after thrust he could feel his tailhole getting much looser. The young fox wasn't holding back either. This wasn't just a regular mating, but a deep and passionate knot fucking. Every pop in and out sent spikes of intense pleasure coursing through them both. 

PLAP POP PLAP POP PLAP PLAP POP

Tails started alternating when he'd give Sonic the full knot and when he just teased him with it. It felt so good. He was never sure when that knot would be forced inside until it happened. It was a constant spontaneous anticipation. Without even realizing it he had also begun to cum. The constant pressure and pleasure was milking out streams of his cum directly into the water. Looking down after several minutes Sonic was shocked to see his cock throbbing and spraying.
“Oh f…FUUUUCK!” The sudden realization caused Sonic's knees to shake. 
“Oh Mobius, Tails! You're milking me dry! Don't you dare stop!” 

“S…Sorry, Sonic I'm really close. I…I'm gonna…CUUUUM!” 
Tails’ knot swelled up to its full size and slammed into Sonic's tailhole with a loud POP! The young fox's normally high pitched voice dropped several octaves as he screamed and grunted, tying himself to his lover. Gripping Sonic and tight his twin tails spinning, he lifted them both up out of the water and onto the floor.

“Wooooooah, hey!” Sonic said in surprise as they hovered up then down again. With Sonic hitting the floor, sprawled out and completely at Tails’ mercy, he could only moan as he felt the young fox's thin boyish cum splash inside him. Except…IT WASN'T THIN!? The blue hedgehog could feel something completely different than before. Tails was filling him with the real deal, thick cum! This wasn't the few spurts Tails normally produced but blast after blast of wonderful love juices. Despite being in the midst of his orgasm, Tails continued humping Sonic as well. Grinding his swollen knot in circles as he gave him everything. 
“Fuck, Tails…t…too much.”

“Shut up and take my seed!” Tails growled, the boy now completely lost in his animalistic instincts to breed. He was acting so differently today. His previously innocent demeanor now replaced by a sex crazed young man. Sonic was reminded of their experiment several months earlier. Tails in an older body was similarly aggressive, but at least right now his cock was still on the smaller side. 
As Tails finished cumming, he pushed himself up to his knees and yanked. Sonic let out an involuntary yelp as the young fox’s knot popped out of him. Tails, despite being completely spent, reached under Sonic and flipped the hedgehog on his back. Sitting on his chest, Tails leaned down to the exhausted and panting hedgehog and kissed him. 

“Mwah. Huff, huff, huff…Tails what's gotten into you?”

“Hehehe,” Tails giggled softly. “I'm spoiling you rotten, that's what. That…and I think I’m finally starting puberty for real. Sorry I didn't tell you sooner. It started a few weeks ago. I just feel like cumming all the time now. You felt it right? The thick stuff like yours? It feels even better now than it did when we did it before. I love you, Sonic the Hedgehog!” 
Kissing him again he finally saw Sonic's expression go from exhausted and shocked to happy and horny again. 

“Well then, since my sexy little fox is growing up, I guess we need to try something new.” Sonic replied slyly. Though he was already sore, he was still hard and did want to return all of Tails’ energy somehow. Plus he still had to cash in his promise to return the favor from their experiment. 
“Take this!” Sonic pushed Tails up and onto the floor essentially switching their positions. Pinning the fox down and kneeling on his legs, Sonic pointed his dick towards Tails’. 
“You know I've been wondering just how stretchy you can be,” he said, tugging at the edge of Tails’ sheath. 
Slowly he ran a finger around the fuzzy sheath, making sure to add a little rubbing to Tails’ shrinking knot at the same time. Tails gasped as Sonic's finger pushed forward inside the sheath. Adding a second digit, then a third, Sonic soon was probing and pulling the skin out a considerable amount. 
“Not bad little buddy. Not bad at all. You're growing up fast on me. Think I can try getting in there?”

“But you're already in S…Whoa!” Tails gasped as Sonic poked his cock at the edge of the sheath. It was only then that he realized what his lover had in mind. 
‘“Holy crap Sonic, this is really kinky!” Tails said, eyelids lowering with a devilish grin on his face.

“Sure is,” Sonic chuckled, “Now let's see how deep I can get.” Pushing his hips forward, Sonic replaced his fingers with the tip of his dick. He gently slipped it into Tails’ sheath, snug against the knot and let the remaining skin hug them tightly together.

“Ungh!” Both boys grunted. The fit was tight but instantly pleasurable. The pressure against Tails’ boyhood was wild! He could feel his sheath stretching to accommodate another dick while still having a little room to spare. As Sonic slowly pushed in further he felt his member being pushed out of the way for the hedgehog's tapered cock. Deeper and deeper it went to both of their surprise. It slipped halfway into Tails’ body before both finally felt it stop. Looking down then up at each other, they let out a simultaneous moan.

“Holy crap Sonic!” Tails gasped. “This feels so crazy!”

“Hngh! Tails, your sheath is so tight I'm gonna, ARGH!” 
The pleasure was just too much for him to take. Sonic couldn’t help but cum harder than he ever had before. His hot love juices erupted from inside Tails’ sheath, spraying out around the fox's cock. The two of them shivered, moaned, and watched in awe as the tight folds of skin overflowed. 
“Fuck, Tails!” Sonic gasped. “This is..it's…”

“Shut up and kiss me!” Tails shouted, grabbing Sonic’s head and forcing their lips together. Tails forcefully rolled his tongue around with Sonic's as they both humped together through the last few spurts. While they had been in a bathtub at first, they were now on a cum soaked floor laying in a pool of their mixed seed. Breaking from the kiss, Sonic pulled out of Tails’ sheath with a satisfying SHLOOP. 
“Oh Sonic, that was incredible!” 

“Huff, huff, yeah…it really was. Heheh, you think we should maybe get back in the bath, little buddy?”

“Probably,” the young fox laughed looking over their cum soaked bodies. “I'll grab extra soap.”

… …

Sitting in Sonic’s lap, the two boys took turns washing the other in the warm rolling water. Both of them were more than satisfied physically for the time being, although Tails knew that wouldn't last long.

“So what else did you have in mind for us this weekend, little buddy?”

“Well,” Tails giggled thinking about how much intimate time they still had together. “How about 69 before bed? Then tomorrow morning you can breed me until breakfast.”

“Sounds like a plan.” Sonic replied, swiveling Tails’ head around for one more kiss. “I'm so lucky I have such a sexy boyfriend to have all this fun with.”

Tails blushed letting Sonic's take the lead on the kiss this time. 
“And I'm lucky to have a boyfriend who loves a kid like me.”