You take a chance

You wiggle your hand inside Julia's PJ's and grab her ass. She looks at you shocked and ask are you touching my butt. You simply answer no and she just wiggles and watches the movie. You begin to grope Julia's ass and stroke your erection until the movie is over. Once the movie is over it's about 10 o'clock and your friend tells you lets go to bet so you go upstairs and go into the guest room. The guest room is connected to Julia's bedroom and bathroom. You say ya it's about time we settle in. So you go to your room and wait for his sister to take a shower you then sneak in to her room and strip naked and stand in front of the door. You wait about a minute before she opens the door and sees your naked she yells what the fuck but no one hears her. You tell her you told me to come in your room naked. She looks at you confused. You then tell her to lay face down on the bed and don't look up. When she does you get a nice view of her ass jiggling with each step. When she lays down you crawl on her bed and postion your self so that your dick is I between her ass cheeks. She asks what are you doing, and you just tell I'm just doing what you told me to do. She then relaxes and lays face down again.