Tyler woke up in the middle of the night to thudding.
THUD. THUD. THUD. THUD.
Rhythmic. Intentional.
He gets up out of bed and tiptoes his way out into the hall. His dad, Steve, had been divorced from his mom for a couple of years now. Tyler was 16 at the time, and had just turned 18 a couple of months ago. He still sees his mom, a couple of times a month. But that didn't mean his parents got on.
As Tyler peeked through the banisters of the stairs, his eyes widening at his dad and his best friend, Mark, going at it like a pair of rabbits. They were kissing passionately, their hands drifting all over each other's bodies as his dad plowed into Mark. He felt weird watching, but he couldn't take his eyes off of Mark… he'd always thought he was attractive- a bigger guy, with a huge ass that you could eat off of. Tyler felt his cock hardening. Fuck… he shouldn't be watching this! Before his horniness took over his brain entirely, he fled back upstairs to his room.
But Mark had smelt him. The beast inside of him, Klor, had smelt him. His asshole twitched as Steve filled him with cum, farting it back out onto Steve's stomach with a splat. "Mmmh… thanks again, Klor- I really appreciate you fulfilling my, er… needs." Steve adjusted his glasses, looking down at the larger man. He'd known Klor, a Slitheen, for a couple of years now, since he had moved to the neighbourhood, or, well… since the skin housing Klor moved to the neighbourhood. The two met whilst Klor was inside of his neighbour, Mark's, skin suit. The two had become fast friends, with Klor going as far as to reveal his true form. Steve didn't mind, in fact, he found the idea quite hot. "Anytime. Go on, head to bed. I'll see myself out." Klor smiled, standing and planting a large kiss on the crook of Steve's neck, sniffing his lust and desire. Not as good as fear, but still a lovely scent… "Just remember, my fat farting ass is always ready for you." He whispers into Steve's ear, giggling, before grabbing his clothes and getting dressed. Steve blushes. "Don't get me going again, you alien, you." He laughs, pulling his dressing gown tight once more, walking to his room silently, hoping not to wake Tyler. He waved once more at his alien friend, walking upstairs and disappearing into his room. Klor grunted, smirking. "Time for round two."
—
Tyler sat up on his bed, jerking his cock furiously, imagining it was him fucking Mark's fat cheeks. Suddenly, his door creaked open. He quickly covered himself, but upon seeing Mark enter, he relaxed slightly. "What are you doing here?" He whispers. Klor simply sat down on the bed, his body jiggling as he did. "I smelt you downstairs, Tyler… all that lust and desire… you were radiating it. You want my fat ass too, huh? Just like your father, you are…" He teased, stroking at Tyler's thigh. Tyler blushes deeply, shaking his head. "N-no, I… I was just… I heard some… ah…" He couldn't speak as he saw Mark stand, dropping his trousers, revealing his fat, hairy cheeks. "Tell me. Are you as depraved as your dad? You want my farts?" Tyler considered for a moment, but shook his head. "Tough. You're getting 'em anyway." Klor shoved Tyler down, squishing his face with his doughy cheeks, engulfing his senses in the unwashed ass funk. Tyler struggled for a moment, before giving up. He might as well just submit, how bad could it–
PHHHHHHHHHHBBBBBBBBBTTTT! FRRRPPPPPT!
"Fuuuck, those were monsters! Heh… like me." Klor tensed up, moaning. "Ooh, that's right…" He felt an eager tongue licking at his hole and he glided his asshole along its length. "Fuuuuuuck! Yes! Eat my dirty hole!" He suddenly stood up, grabbing Tyler by the scruff of his neck. "Listen here, Tyler. You're gonna have to forget that 'Mark' fella you knew… because my real name is Klor. Now, you really wanna fuck me? Get to it." He spread himself, his asshole winking invitingly. Tyler, a little confused, just goes along with it. He's never gonna get a chance like this for a while to fuck his dad's best friend. "Well then, Klor… get ready for a fucking of a lifetime." Tyler whipped out his fat cock, it was slightly bigger than Steve's, and shoved it into Klor's fuckhole as it began to suck him in. "Ohh, yeah! Just like that, human! Fuck me good!" Klor looked back, enjoying the slight smell of fear that began to radiate off of Tyler, alongside the lust. "Oh, yeah- but you're enjoying yourself so much that you don't even care that I'm wearing the dead skin of your neighbour, do you? No… you're gonna fuck my farting ass until you cum!" He smirks, watching Tyler hesitate.
Thoughts rushed through his head. What was happening? His neighbour was an alien? Wearing dead skin? But…he was so hot, so alluring, so…
Tyler had a determined look on his face. "I don't care about any of that. You're intoxicating." He started to pump his cock in and out of Klor's asshole, fucking the alien in rhythm. Every time he would pull out slightly, another fart would escape his filled hole, accompanied by a loud sound that would vibrate on Tyler's cock, edging him closer and closer to orgasm. As he fucked Klor's farting ass, he grabbed onto his hips, guiding his ass to be flush against his skin.
"You know the best thing about me being an alien, Tyler? You name anyone, I'll go skin them and you can fuck them. Your dad's made three requests this month." He smirks, watching the fear turn to an intense need in Tyler's eyes. "Oh, fuck yes..! Please… but we have to keep this a.. Secret!" Tyler felt himself getting close. "Shhh, baby… I won't say a word… you're too good to lose." Klor blasted a final fart, causing Tyler to climax, his cock like a machine gun, shooting out his spunk in bursts. "Fuuck!" He collapses down onto his bed, Klor towering over him. "Now get some rest… make sure you tell me who you want to fuck next time." He winks, pulling his clothes back on and walking out of Tyler's room.