Feminization games

"What the fuck is going on?" Dylan demanded angrily, unable to process why he was tied up. Did Emily **** him? Her sister was grinning haughtily.

"Oh, I don't know. Maybe I'm just a wizard now!" Emily said as she made a ball of blue flame appear in her palm, making Dylan gasp. "It's now payback for your shitty attitude towards me."

"Shitty attitude? You're the useless bum who's staying at my house! How dar-" Dylan suddenly found speech difficult, as something was stuffed in his mouth. It was Emily's panties. With a wave of her hand, she turned Dylan stark naked. She caressed his chin, admiring his androgynous looks. Looking down, he saw his cock was slowly getting hard.

"Oh my god, are you getting hard at your own sister?" Emily burst out laughing. She couldn't believe him! Dylan blushed in shame, his hands still bound and was unable to hide his now fully-erect penis. He hated his sister, but at the same time Emily was one of the hottest girls Dylan had ever laid eyes on. He would always pop a boner in her presence, especially since the girl loved wearing next to nothing at home.

Emily batted at his cock playfully. A wicked idea hatched in her mind.

"Dylan, oh Dylan. Let's play a game! Let's see... if you lose, I'll turn you a bit more into a girl. If you win, well, you get nothing!"

"For your first challenge, you'll have to keep yourself from cumming for the next, oh, let's say, seven days." Emily placed her soft ass on his thigh and caressed his cock playfully with her fingers. "So if you ever cum at any point-" She gripped his cock and started to stroke it, causing Dylan to shudder from pleasure. "-I'll make you more of a girl. Prettier face, smaller cock. Small boobs."

Her hands did not stop milking his cock. Dylan squirmed from her, but being constricted by the rope he could not resist Emily at all. Forget one week, if his sister continued her handjob he was going to lose right now! Dylan frantically tried to distract himself from the stimulation. Think unsexy thoughts! Old grannies! Hitler! Anything!

"Oh Dylan, have you really always lusted after me? Tell the truth!" Emily commanded using the power of the necklace and removed his gag.

"Yes! You're just too sexy, Em, and I really hate that you are," Dylan said automatically. He realized Emily had **** him to speak the truth and glared angrily at her.

"Such a hopeless pervert. Isn't this a dream come true, then? Come on, don't you think it would be amazing to jizz in my hand?" It would... but I don't want to turn into a girl! "Emily, please, stop this already!"

"Nope. Not gonna." Dylan could feel his climax approaching. He despaired at his predicament. Was there anything he could do?