“Well nephew, how do you feel?” Your uncle said, coming over to where you’re standing, looking at yourself in the mirror, and running his hands over your hairy, sweaty body, “Think you’ll enjoy being my slobby boyfriend?”
“Fuck Unc, I feel amazing,” you say, “But…but what about school? And what are my parents going to say?”
“Well, I think you’re a bit old for school now, nephew,” he said, “My spell had a little age progression component to it, so you’re well into your twenties now, which also means you don’t need to live with your parents anymore—why would you, when you can live with me, right?”
He leaned in and kissed you, and you happily kissed him back, your tongues exploring each other’s mouths, your big cock already starting to harden again up against your uncle’s thick thigh. “Fuck, I…I know this is wrong, but I’m so fuckin’ horny…”
“That’s just how I want you, nephew,” he said, “Too horny to think straight. Now, why don’t we have a little fun, eh? I know you said that you weren’t interested in my costumes before, but now that you can see what a little magic can do, I bet we could have a lot of fun with some of these outfits, don’t you think? In fact, I have a special section I like to reserve for the dirty men I play around with. Come with me.”
Your uncle grabs hold of your big cock, and uses it to lead you deeper into his costume shop, and you follow along behind him, unable to take your eyes off your uncle’s ass—imagining how good it would feel to fuck him with your big cock. “Fuck, why don’t we just fuck around some more, Uncle?” you moan, “Staring at your ass is making me all horny again.”
“There will be plenty of time for that—don’t you want to try something on? After all, I can’t just have you wandering around naked all the time.”
“Why not? That sounds pretty hot to me.”
“Shut it—you know what I mean.”
The two of you go through a little doorway tucked off to the side, and there you find display racks full of costumes that your uncle has clearly set aside for men like you. All of them are large enough to fit you, and all of them look like they’re designed to satisfy one or more of your uncle’s filthy, perverse fetishes. Now that you’re looking at them through your own slobby, horny eyes, you see quite a few that might be pretty fun to wear yourself.
“I’ve enchanted all of the costumes in this room,” he said, “It’s my life’s work, really, and I don’t get to enjoy them with men as often as I would like. Some of them will change you more physically, some of them can even change your memories and your personality.”
“Sure—but it’s all temporary, right?”
“I mean, if we want it to be, sure,” your uncle said with a wink, “But if we like something, we can always see about making it more permanent.” He walked a little deeper, and picked up a rather mundane looking leather collar off a table, with a befuddled look on his face. “Huh—I don’t even remember making this one,” he said, and a little energy flowed from his hand into the garment, and he snapped back a little, his face going a bit red. “Oh—maybe not that one…”
“What do you mean?”
“Well, you know. Sometimes, when you’re horny and lonely, and you drink a little too much, your fantasies can get a little wild,” he said, “It’s not like it would hurt you or anything.”
You look around again at the costumes filling the room, and feel a little twinge of anxiety. Sure, your uncle is a hot fucking pig, and you love that about him, but he does seem a little…nuts too. You’d have to be, to turn your nephew into a fat, stinking, horny slob, you suppose, not that there’s anything wrong with that! You certainly don’t have any interest in changing back. “Maybe you should pick something out for me,” you say.
“Nonsense! I didn’t mean to scare you. Look, spend a little time looking around, pick something out, and try it on. I guarantee you won’t be disappointed,” he said, walking off with the collar, “I’m just gonna go deal with this thing real quick. When I get back, I want to see you in some sexy fuckin’ outfit—I mean it!”
Your uncle left the room, muttering to himself as he looked the collar over, and you were left alone in the room full of costumes. You looked through the racks, one hand toying with your big cock, and clearly your uncle’s tastes were rubbing off on you. Pretty much every single costume you came across made your big cock jump a little bit—but one of them definitely stood out among the rest. You pulled it off the rack, and looked at it. It seemed innocuous enough, but then, so had that collar which had worried your uncle. Maybe it would be better to wait until he got back—but then, he did say he wanted to see you dressed when he returned. It was just a little magic, and if anything terrible happened, your uncle could probably fix it, right?