Both of their hearts were pounding as they looked behind and saw their parents' car pulling up into the driveway. When they were safely behind the tre...s, they crouched down and looked back."Do you think they saw us?" she asked."I doubt it," he said, "Let's go further in just to make sure."So they started walking butt naked in broad daylight further into the woods towards the big pond. His sister was walking ahead of him and he just resist staring at her very nice ass as it rhythmically bobbed. "Hey Bro, have you ever heard of 'Schrodinger's Anal Sex Paradox'?" asked Jessie, "Is it similar to Schrodinger's Oral Sex Paradox?" I asked with a inquisitive look on her face."As a matter of fact it is, with some minor differences" she told me," Instead of being covered with blankets, the theoretical participants wear blindfolds and earplugs and engage in anal sex, and because they cant see or hear they could be theoretically be fucking anybody; they wouldn't know for sure unless they took. I looked up at her and she didn't move or make a sound, so I put my mouth over her tit and began to suck on her big breast as I sucked her tit I looked up at her and she was snoring lightly,my cock was throbbing,I stood up and looked at her snoring lightly and legs spread open wide I then remembered how her panties smelt and tasted and wanted a real taste. I looked down at her hairy bush and wondered if she would wake up if I went in for a taste, my heart was racing so fast with excitment that. She couldn't quite sit on it!We enjoyed each other and didn't make a big effort to find people. It was like a hangnail. You noticed it when it bothered you. I noticed when Wendy looked particularly good and I wished we had more friends to who I could show her off. With the world being so empty, it was hard to find any people and, when you did, you worried about what kind of people they would be. In our towns, we saw little sign of people. There were more signs of people in the Knoxville area.