Tom spent his next day in school carefully following Sophia, as he didn't have a better idea other than waiting for her to be alone for a moment. He kept himself behind corners, always watching, but never catching anyones attention. However, Sophia was never alone and was always accompanied by someone from her clique. So Tom kept on watching, like a carnivore silently stalking its prey.
After P.E., Tom quickly showered and dressed himself, finishing first. This day, he saw that Sophia had put quite some effort into it, so Tom decided to count all the girls entering the girls locker room and then counted down as more and more left. Finally his chance had come... There was only one person left, and Sophia hadn't left yet. All he has to do is make a move.
Tom looked around, to check if anyone was still there, but everyone had already left for home.
Tom sneaked up to the door and listened carefully. He could hear water dripping and splashing in the shower room. As he expected, Sophia took some extra time in there. He slowly opened the door to the locker room, peeking around every edge to make sure that no one except her was left. Without a sound he sneaked into the shower room and saw her:
There was Sophia, completely naked, water pouring over her head and skin glistering from the wetness. He could finally see her hourglass frame in its full nude glory. Her breasts must have at least been a DD cup or bigger, yet they stood with youthly vigor firmly on her chest with only very slight sag. Her breasts were topped off with beautiful perky nipples, screaming to be played with. Her figure was only accentuated by her big, round and firm butt. She could seduce any guy she wanted if she wanted to. Oh how Tom was happy to ruin all that...
Tom fell out of his trance and took out the sticker dispenser. He thought off the 1 foot cock sticker and took it eagerly. He had the advantage of suprise, once the sticker was placed, she was completely in his hand.
Tom readied himself and dashed at Sophia from behind the corner.
Sophia only now noticed him and was about to scream, but Tom quickly tackled her down and held her mouth shut. Using the moment of suprise, Tom quickly placed the sticker right above her pretty little pussy before jumping back up, smirking in victory.
"What the hell is wrong with you you pervert! I'm gonna tell everyone about this! Wait what is that?!"
"I don't think you'll be able to tell anyone. After all, if you do, you'll stay like *that*"
"What the hell do you mean?!"
Sophia looked at the sticker. Strangely enough, it was about the same colour as her skin. She tried to grab the edge of it, but no matter what, she couldn't get even the slightest grip on it. It was like it didn't even have an edge. However this was the last of her worries for now.
Due to the sticker, Sophias pussy lips crushed up together and fused completely shut, as her clit stayed and became larger. And all she could do was watch in horror. As her clit lengthened, it moved to the spot of the sticker. Slowly it grew larger as darker skin slowly crawled up along its length... 0.5 inches, 1 inch, 1.5 inches, 2 inches... Once it reached 2.5 inches, the tip of her clit bulbed out. Her clit could no longer be called that as a hole formed at the tip, it was now undoubtedly a penis.
Gasping, Sophia could feel another feeling, as the place where her pussy used to be bulged up and grew to form two distinct orbs, already churning with semen.
She thought it'd finally ended when she seemed to have an average male cock&ball combo. However, fate wasn't that generous to her. After a tiny pause, her cock and balls once again expanded, but this time rapidly... 6 inches, 8 inches, 10 inches and at last one foot. Her balls stopped growing when they each were the size of some big juicy apples. Due to their size and fullness, they looked rather smooth and almost seemed like they were about the explode. Her cock was nearly as thick as a can of cola, and her mushroom head expanded unnaturally wide, while her whole shaft had a slight but visible bend to the right. Her foreskin hardly kept up, leaving around two inches of her shaft nearly completely bare.
"Haha, what an ugly cock for such a terrible person!"
"What have you done? How..."
Sophia kept clawing at the sticker, tears welling up in her eyes.
"Why won't it go off?"
"You cannot remove it. Only I can. And if you do what I say, perhaps I will. From now on you'll be my own personal bitch!"
Sophia would have started crying, if it wasn't for the sudden wave of pleasure that hit her. Her unnatural mushroom cockhead started twitching and her balls cried for release. With no further thought, Sophia gripped her huge cock with both hands and pumped uncontrollably, her boobs shaking along with her wild strokes. Soon enough, her cock flared up and shot wave after wave onto the ground and herself. Soon afterwards her monstrous cock went soft. However, it only receded into a length of 9 inches flaccid, now with some foreskin hanging too far over her cock, cum still dribbling out.
"Did you understand? You're my bitch now. For your first task, make your stupid friend group stop bothering me. We'll meet again in two days, I'll decide the place we'll meet at. If you don't come I will punish you later, and if you keep annoying me, I'll consider keeping that ugly cock on your crotch forever."
And so Tom left her sitting there, in a puddle of her cum and tears. This was gonna be fun.