You look around a bit just to make your uncle happy, but you’re really not in the mood to dress up in any of these. You shuffle through the racks of furry and human costumes listlessly, before you hear your uncles footsteps from the creaking stairs echo throughout his shop. “You find something you like?” Uncle Jack asks with an enthusiastic grin on his face. You glance away for a moment, feeling bad for not humoring your uncle, “Honestly, I really don’t feel like dressing up right now, Uncle Jack.” You tell him. His smile fades, “I’m just not that crazy about all this-“ your voice trails off as your uncle begins muttering, waving his hands around towards you, making you uncomfortable. Suddenly he snaps his finger, causing a green spark between his digits, a strange sensation enveloping your body. “We got a few long weeks together and I figure I want to spend them with someone who’s excited to hang out with me,” he tells you gripping your shoulders. You stare into your uncles face…his handsome fucking face. You become filled with lust for your uncle. Without the thought of knowing this is wrong crossing your mind once, you run your fingers through Uncle Jack’s beard, your cock tenting in your jeans as you do. He pushes your arm out of the way and pulls you into a deep kiss. You become putty in your Uncle’s hands, wrapping your arms around his neck as you’re consumed with lust. You suddenly feel bloated and push without a second thought, releasing a loud wet fart that cuts through the romance, without a bit of shame. Your uncle laughs, “The slob spells taking hold already. I usually save it for my dates but soon you’ll be my fat, hairy, smelly boyfriend who doesn’t care one bit to fuck his family. Fuck, you’ll be my finest work yet, lucky if you aren’t pissin’ & shittin’ yourself when i’m done with you.” You hesitate for a moment, as the realization of what’s happening sinks in…just for a moment though, because almost instantly you’re back to making out with Uncle Jack, exploring eachothers mouths with your tongues, your hands under his robe, gripping his ass. With each kiss you feel yourself changing, your skin tingling as hair covers your body, your clothes tightening bit by bit. Your cock begins growing tenting up against your jeans that are already several sizes too small, becoming tighter and tighter until… The button holding up your pants shatters with a loud, sharp pop. Your uncle pulls away for a moment, a long strand of spit connects the two of you for a moment before dropping. He pulls on your beard that you didn’t realize was there,“lets get you out of those tight jeans before I gotta cut you out of them.” Uncle Jack undoes his robe letting it fall to the floor, revealing his naked body, showing off his cock that would put a horse to shame, dripping in precum. You run your hand down his greying chest hair, gulping with anticipation. He presses you against the wall of the costume shop, before getting on his knees and jerking down your pants to your ankles, your new 12 inch cock all but smacking him in the face. Your foreskin had grown back around your cock, precum leaking onto the wooden floors. Uncle Jack buries his face into your tangled fatpad of filthy, sweaty pubes and inhales your sent deeply. Licking his lips, he pulls back your foreskin revealing an unwashed center, caked in cheese. Instantly he goes to town with his mouth, rimming the head of your penis, licking it clean, causing you to moan in pleasure especially as he begins to suck your dirty rod. You feel the transformation begin to speed up, becoming, fatter hairier and more disgusting, like a gross balloon. You close your eyes, moaning in pleasure and almost in an instant your uncle’s obscured by your fat hairy man-tits and large belly, now resting on his head as he blows you. You feel yourself edging closer and closer, until you shoot the largest load of cum you’ve ever made into your uncle’s mouth, biting into your arm so your howls of pleasure don’t echo outside onto the streets. Uncle Jack appears out from under your belly grinning, your load dripping down his beard. “Not bad, for an old man, huh,” he heckles you.“You gotta see how sexy you look now.” He walks you over to a nearby mirror, the floor creaking under you with each step. You light up when you see yourself. You admire your giant hairy belly, fat man tits, thick thighs. You have to have put on well over 300 extra pounds, not that some of it isn’t your giant new cock. Your face has ballooned up, thick, dirty beard covering up a set of extra chins. You raise your heavy arms to reveal your greasy, hairy pits, you can’t help but take a whiff. “God I fucking stink,” you tell your uncle laughing. Uncle Jack laughs back, touching himself, enjoying his new creation.