I patted the pocket with the slip of paper with their address and phone number that they gave me yesterday as I walked back to finish packing.We left ... few minutes before check-out time at noon, and I let Brad drive. I was exhausted from all the marathon lovemaking and packing up today. I just wanted to close my eyes, sleep, and wake up at home sweet home.I woke up when Brad stopped for gas, and we had a bit to eat. Carel drove the rest of the way home.We finally had all the bags, and dirty. ”“Oh, well, we can’t have that, can we,” she said. “I like them how they are. Do you know why they shrink when they get cold, anyway?”“I have no idea, you’re meant to be the biology expert,” I replied.“It’s something to do with temperature, keeping them warm enough,” she answered. “Your balls, I mean, sperm cells die if they get too hot or too cold. But why does your prick shrivel up too? That doesn’t make sense to me. Anyway, I know how to make him big again, and how to warm him up.”I looked. She sunk my entire length and I felt our pelvises slap together. I couldn't believe I was buried inside of my sister. We both leaned slightly back to enjoy the moment and look down at our united bodies. *****************************************************************************************Emily opened her eyes after thrusting herself down upon Luke. The wanton look on her brother's face was almost as satisfying as the feeling of his thick cock buried inside of her. She couldn't believe that. Ali said she thought Mary should decide that. Turning to Mary, I asked what she would be the most comfortable with."I think I'd like to watch you fuck Ali first, daddy. I've never seen the whole thing, Billy ran away to find Suzy before they were finished," Mary said hesitantly.Ali laughed, "Sounds logical to me and I'm willing." Alright, now a couple of other questions Mary. First of all, are you still a virgin? By that I mean, is your hymen still intact? I'll be damned if I'm going to bust.