Not at first

“Nnnoooooo I’m nooottt!!!” You moan out, pinned by your sister as she grinds against your ass. You’ve never felt this helpless, your own desire causing you to be too weak and flustered to hold her off. Especially once you realize you feel something hard now against your ass.

She hadn’t realized it at first, but her manhandling you made her suprise erect in her pants, to where you clearly felt it, and she realized you felt it. She stopped, unsure how to continue since she thought this was a secret. You realize she might fully stop everything in hopes you won’t connect the dots or just forget about it. But that’s not what you want!

“Please... please use this sissy bitch.” You mutter. That breaks her out of one shock and into another.

“What did you say?!”

“Please use this sissy bitch!” You say louder. The evil smile comes back.

“Fine. But remember, you asked for it!!”