Your sister is babysitting you for the first time, and you walk in on her in your parents room acting curiously. She's dressed in a very tight top and skimpy skirt... sexy thigh highs... high heels... Looking at herself in the mirror, she spots you for a moment and asks how you think she thinks. Apparently she raided Mom's closet and found some "adult" stuff. She's a beer and saying that she's being the "grown up" tonight, and you'll have to be good for her. If you play house with her, she will always give you a good night in return. Playing house means that she's Mommy and you're Daddy. She continues to slip up and call you her brother, but then reminds herself and you that you're only "playing". However, it all ends with her telling you to strip down and jerk off to her "grown up" "Mommy" body. You'll have a lot of fun with her... but only if you tell your parents that she was a great babysitter, and back her up when they want to give her gifts for her being so "mature"