Lovely Lilith - Trick For Treat

Your sister has been a royal bitch to you lately and making you angry. Your parents are going out of town for the weekend and she wants to throw a Halloween party, but you're not invited. You overhear that she's anticipating the biggest jerk on campus, Chad, is going to be there - and she wants to fuck him. Wanting to ruin her night, you come up with the best idea. Your sister will have no idea it's you and not Chad under that mask. What's a little fun between siblings anyway?