By this point she was sitting on the bed and starting the undo my belt. She slowly took the belt off and dropped it to the floor. Then she undid my tr...ousers and started lowering them, while gently kissing her way down my stomach. With only my boxers remaining she took her lips and slowly covered my erection enough that I could feel a slight touch from her teeth. This lasted for just over a second before she removed my boxer shorts.She then had us swap positions so that I was sitting on the bed. I noticed there was several more rooms, mostly with the doors closed & the lights off but there was one with a soft red light on & the door slightly opened. I walked over my cock waving freely 7 unrestrained in the dim light & peaked in to see a guy sitting on a bench with another guy on his knees in from of him sucking his cock, they noticed me but did not stop, in fact the guy getting sucked seemed to be enjoying the fact that i was watching.I could clearly see his cock going in & out of the. Spoon turned into glorious reverse cowgirl. As much fun as it was seeing her hot pink labia gripping and riding up and down along my shaft, I knew I didn't want to cum without trying doggie-style with this shapely girl. Remember - she had that awesome wide set of hips and round ass. I managed to crunch upward in a kneeling position, she on all fours. Rebecca's intuition was at play again because she said, "Oh yeah, can't leave out doggie-style." I was so into it at this point that I was barely. For next 20 minutes we were watching it but my sister was yawning as those were nothing for her. I just told her that something is happening with my penis, as if it’s bleeding. She told me to stay relax as those are my pre-cum. She asks me if she can check. I don’t know why but I let her do so. She opens the buckle and unzips my pant. Holding my penis in her hand knocked me so hard that I cum right on her palm. She again giggled and said “you still have lot of things to learn.” She got her.