They agreed knowing we didn't want our mothers finding out we were drinking when they were gone.A couple hours later we had the house ship shape. I to...ld the girl I would grill some burgers up and we could hang out by the pool until our moms got home. The girls went upstairs to put on their swim suits as I grilled up the burgers. After we finished eating the girls wanted to jump in the pool. Still just in my shorts I dove in followed by the girls. For what ever reason the girl thought they would. Anna’s bra came off, and the guy (Rob) buried his face between her tits. Anna moaned softly, as his lips found one of her nipples, and then turned to me and said “I have a surprise for you”. Her hand slid to the waist of her panties and she tugged them down slightly, smiling mischievously. I took the hint and gently pulled them down her legs, revealing my surprise, her newly bald pussy. From behind Rob I heard Anna say “You can see me better now” and she was right, nothing was left to the. . The mathematics wasn't quite suggesting that. But what it was suggesting was just as bizarre. That if free will were not an illusion, then going back in time should have caused a causality violation." Which would do what?" Jim wasn't sure. He wasn't too happy though. He muttered something about all of reality unraveling, and then looked very embarrassed... more confused than frightened. I can't wait to talk with him again."The two walked outside the tent to stretch their legs. The night stars. This time the back and forth, in and out motion continued. I flattened out, content that I was being ass fucked at last. Finally I was happy with the realization that I was under another woman with a cock. Happy that I was being ass fucked by her. She buried herself in me over and over again. Then she withdrew so she could add lube and we could enjoy her reentry, all the way to the hilt this time, I felt her pelvis riding me. “Ahh” a cry combined with a gasp escaped from deep within me.