Chapter Text
Peter wondered when the next time Derek would come to him. It was only a few days later and Peter couldn’t stop thinking about their time together. He wondered if Derek would be open to taking him in different ways. At night, he laid awake and wondered if Derek would sneak in again. When nothing happened, Peter thought about taking things into his own hands since Derek clearly liked being bossed around.
As he laid in bed, he decided that he would remind Derek in the morning of what he told him. With that sorted he laid in bed trying to go to sleep before he got slightly thirsty. He groaned in annoyance that his body would betray him like this to make him leave his bed. He went down into the kitchen to get something to drink. As he took his first sip, he thought he heard something. He tuned his ears and when he didn’t hear anything, he continued drinking. He put the glass in the sink and just as he stepped out of the kitchen, he heard it.
“Peter.” His name was being called. No, his name was being moaned. A smirk grew on his lips, and he headed straight for Derek’s door. He remembered protesting in his mind when the wall and door was built since he didn’t have access to see Derek’s body from the living room. He opened the door and was greeted first by the smell of arousal thick in the air. It sent a message straight to his dick before his eyes landed on a glorious sight. The moon shining through the window provided a spotlight onto Derek’s body. Peter gawked at the sight, especially since Derek had forgone all clothing. There he was bare for Peter’s eyes to see as he slept on his stomach.
Peter felt himself being drawn in by the beautiful sight of his nephew’s voluptuous ass. Derek moaned again and thrusted against his mattress and Peter held onto his dick to provide some type of friction. His mind gently reminded him of what Derek did that night and Peter was eager to return the surprise. He kneeled on the bed and slowly spread Derek’s legs enough to slot himself in between.
From this position, he wondered how Derek would react to feeling his dick directly on his hole. He suddenly had an even better idea and leaned down to deliver a kiss on one of Derek’s cheeks. He kissed the other cheek before he used his hands to reveal the pink hole begging for his attention. He gathered some spit and let it slide out of his mouth to land directly on Derek’s now glistening hole. Peter wished he could take a picture of the entire sight from Derek’s thick thighs to his pink hole, but his phone was upstairs.
When Derek moaned again, Peter decided to do more than just look, and ran his tongue from Derek’s perineum to the hole he’s been dying to get to. Peter knew that giving into his desires was something he would enjoy but the first taste of Derek’s hole was something he never anticipated. It was as if he unlocked something within himself, something primal, that wanted nothing more than this. He started licking and trying different pressures with it before Derek started to stir. He placed his hands on Derek’s cheeks, pinning him to the bed as he continued to devour his hole. He could hear Derek groan in confusion before he moaned again.
“Oh fuck, Peter, wha-” Derek was cut off by his moans again when Peter slid his tongue into him. Peter smirked in his mind when he felt Derek start to push his ass back into him and move his legs to make more room. Peter began alternating between lapping at Derek’s hole and trying to fuck him with his tongue. Peter suddenly stopped and when he heard Derek whine, he smirked and spread the cheeks before him. The glistening hole was calling out for his attention but there was something he wanted before he would continue.
“You want me to keep going?” Peter asked and Derek nodded.
“Yes, please.”
“You know what to do.” Peter responded and Derek whimpered. “If you really want it, show me.”
Peter full blown smiled when Derek brought his knees together and pushed his ass higher into the air. With his chest to the bed, Derek was in the most vulnerable position he’s ever been in. He whimpered once more as he blushed from his position. Peter couldn’t help but growl as Derek presented his hole to him. The significance of it weighed heavily for him and he knew that Derek understood it as well.
For an Alpha to do this meant even more and Peter was a little surprised that Derek presented so easily. He was going to make sure that he made it all worthwhile. He placed his hands on Derek’s cheeks and spread them. He scooted closer and slid his dick over Derek’s slick hole. He thrusted a few times, enjoying the glide before angling it. He pushed against Derek’s hole and easily felt himself slip inside. He pulled out just when the tip was almost in and listened to Derek whine.
“Is this what you want, or do you want more of my tongue?” Peter asked and Derek groaned, pushing back against him.
“Both.” Derek whined and Peter chuckled.
“You can’t have both at the same time. Which one first?”
“Fuck me, please.”
“Dick first?”
“Yes, then tongue or whatever just, please.” Derek groaned.
“Where’s the lube?” Peter asked and a second later it was being pushed back to him.
“Under your pillow? Looks like someone was waiting for me.” Peter said as he poured some lube in one hand. He slicked himself up before he got another idea. “Spread your cheeks for me.” Derek obeyed and pulled his cheeks apart. A second later, he gasped at the feeling of lube hitting his hole directly. Peter closed the cap with one hand and used his other to push a finger into Derek. He slid in another when he felt Derek push back on him.
“Mm, no fingers.” Derek groaned.
“Be patient.”
“I’m an Alpha, I can take whatever you give me.” Peter didn’t need to be told twice. He extracted his fingers and lined himself up with Derek’s hole and watched as he slowly entered him. He imagined this over and over in his dreams and now it was happening. He didn’t stop until he was buried balls deep. He ran his hands over Derek’s cheeks and spread them to look at where they were connected.
“Fuck.” Peter groaned before he grabbed Derek by his hips. “You feel so good. How long have you wanted me inside of you?”
“Peter, please.”
“Indulge me this once and I won’t ask anything more from you.” Peter said, running his hands up and down Derek’s back.
“Ever since I saw you in the shower.” Derek confessed.
“Back at the old house.”
“Yes.”
Peter did nothing but smirk as he pulled out and thrusted back in. Derek moaned and Peter didn’t let up. He kept his thrusts at a steady rhythm, watching as Derek’s cheeks jiggled from his motions. He could watch them for hours, but he had to slow down since the sight had his orgasm speeding along the horizon. Slowing down made it possible to fuck Derek deeper and by the sounds he was getting in response, told him he was doing everything right. On a particularly deep thrust, Derek gasped, and Peter knew he hit his prostate directly.
“Oh fuck, Peter, right there.” Derek moaned and Peter’s eyes flashed as he tapped into his supernatural strength and thrusted. He pulled Derek back at the same time and Derek cried out. After a few more thrusts, Peter heard Derek gasp again before tightening on him. Derek was at a loss for words and Peter could tell that he was cumming.
“Hmm, I didn’t say you could cum.” Peter said, pulling back. He thrusted against Derek’s over stimulated prostate and the Alpha gasped and whimpered.
“I’m sorry.”
“It’s okay, pup. That just means we keep going until I cum.” Peter said before he sped up his thrusts. Derek gasped and held onto the sheets as he was over stimulated and pushed into his second orgasm.
“P-Peter, I-I-”
“Go ahead, make a mess of these sheets.” Peter said, biting his lip as Derek tightened impossibly tight around him again. He buried himself fully in the pulsating hole and groaned as he came, filling Derek up with his cum.
“Fuck yeah, pup.” Peter said as stars bloomed behind his closed eyes.
As he came down from his orgasm, he let Derek’s pulses milk him of everything he had. That didn’t mean that the night was over though. He had a new mission now that Derek had cum without asked or even warning. As soon as he felt Derek loosen around him, Peter continued thrusting until Derek was beginning to fall from his position. His legs were probably mush at this point, but Peter wasn’t done. He delivered a slap to Derek’s ass and the Alpha pushed himself back into position.
Peter leaned back and groaned at the sight of his cum leaking from Derek’s ass. He thrusted harder and it felt like Derek was constantly pulsating around him as he moaned into the sheets. Peter moved his hands from Derek’s hips to his arms and pulled him up. Derek whimpered at being moved, especially when Peter hit his prostate again. Peter wrapped his arms around Derek’s waist when the Alpha’s back hit his chest. The new angle had Derek leaning back onto Peter’s shoulder. Peter knew that far gone look in Derek’s eyes the second they connected with his.
“Look at you, completely fucked stupid on my dick. You even drooled on your pillow and came all on your sheets, but you don’t care, huh?” Peter asked and Derek closed his eyes and bit his lip as he shook his head.
“You think I could knot you?” Derek nodded eagerly at that, and Peter chuckled.
“It’s not as easy now that I’m a beta but I think it can happen. I can tie us together like we were on the couch and fill you up until you look pregnant. Would you like that?” Peter asked and Derek nodded again.
“I know, it feels good to be knotted, huh? Knotted and absolutely filled with cum until you’re leaking with it. That’s how I was and we’re not leaving this bed until you’re the same way.” Peter finished his sentence and rapidly started thrusting. His cum making Derek’s hole a wet and messy paradise as he felt his orgasm rounding the corner again. His breathing started to pick up and Derek held onto him as he pounded his prostate.
“Cum for me, Derek.” Peter told him and Derek turned his head towards Peter, his red eyes burning bright and whispered in his ear.
“Yes, Alpha.”
Peter’s eyes shined a deep blue at those words, and he gasped at the feeling of his knot growing. He squeezed his eyes shut as his orgasm took over his body. His knot grew bigger than he ever remembered as his cum painted Derek’s insides. He groaned as he felt himself being drained of everything he could offer before the room started to spin.
When he opened his eyes, he was on his side in Derek’s bed and the sun was starting to peak through the window. His arms were wrapped around Derek’s chest, and as he came to, he tried to move. Derek groaned and pulled Peter close to him by his thigh.
“No, don’t move.” Derek told him and Peter looked down to see that they were still tied together.
“Sorry. Fuck. It’s morning already?” Peter mumbled before clearing his throat, feeling exhausted. “What happened?”
“It’s only been an hour or two since you fucked me all night. You finally stopped cumming after you were already passed out for about 10 minutes. I had to lay us down, so you didn’t fall the wrong way and pull on your knot.”
“Jesus. I came for that long?”
“Yeah, it felt like it. So, you’re going to buy me a new mattress.”
“We can always move to mine after this goes down.” Peter said, running his hand over Derek’s slightly distended stomach.
“We’re going to make a mess of it too.”
“Good.” Peter said, kissing the back of Derek’s neck as the Alpha laughed.