Occasionally we slowed down to catch our breath or to have some mouth-to-mouth action. Between the thumps and the jumps, she told me she was tired, so...I decided to take control. I held her from her legs, stood up and put her against the marble wall. Good thing for me she was easy on the weight scale (50-52 kg, I think). I pulled out my dick, all but the glans, and pushed it in. Her loud moans and heavy breaths were arousing me more and more. In just around a minute, I felt a sense of urgency. My sister looks down and giggles as she turns to the table and grabs her plate. She positions it in front of me, looks at my pumping hand then up at me with a very dirty grin.We've been into this special sort of arrangement for the past two weekends – our parents go off to work on the new vacation house and Sandy and I remain at home because 'we have school work and a lot of things to do'. As it turns out my sister and I have ventured into a nude brother / clothed sister routine that is a lot. I loved the way I tasted, and it just made me want to taste her even more. I rolled her off of me and told her to flip over. She looked a little puzzled but she did as I said. I then grabbed her by the hips and made her ass stick up in air. Now I can tell you that that was one of the most amazing views I had ever seen. I started rubbing her pussy and she immediately began moaning again. I was actually a little surprised by how wet she was already! I guess she really enjoyed eating my pussy.. Jack was nowhere to be seen. "HeyJack!" I shouted."Over here dude. What's good?" he said."Jack... I think your hypnotism worked," I said.I heard Jack chuckle from the kitchen. "Of course it did, I'm themaster."Just then I started wondering why I was so horny. I felt something on myfinger and pulled off a pube. "Huh," I said. I wondered what hashappened. "Hey Jack, what happened?" Dude it was weird, you were getting so horny and shit. It wasn't eventhe reaction I planned for. You started to undo.