"Oh fuck," I muttered as I began slamming deep and hard inside her back door. "You two sluts are gonna push me right over the edge!" I gritted my teet..., felt the stirrings of my climax build in my groin as my legs tensed. "Fuck!" "Fucking load me up, Lie!" Bonnie called out. "Fill my fucking asshole!" "Come on, baby, unload those balls in there!" I felt her hands on my ass cheeks as they clenched involuntarily, preparing the explosion. "That's it, dump that nasty juicy cum in my sister’s butt,. But As you know, I am single and want to stay that way. My parents had a very bad, and violent marriage and I don’t want to repeat it.But like I said, I would like to have children. I was going to use a sperm bank and choose the donor. Recently, things changed. Lynn and myself have been talking about sharing the role of bringing up children. I could give it life and she could give it love. But we still need a father, or at least a sperm donor. Dan, we would like you to be the father of our. After all we lived in separate cities and if we could meet every month or so we could meet for sex and leave and who are we hurting…it was to be sex and sex only. No emotional attachment. Well that was the plan. The date that we agreed upon was on us and I traveled to his city and booked a hotel room…I was so nervous…after all, I am not the same girl he met 35 years ago…then came the knock on the door and there was no going back…I answered the door and there he was…he stepped into the hotel. Indirectly she gave me a hint that she is also horny. I don’t know how I controlled my temptation till we reached home. On that day for the first time, I cursed myself not taking the car.Such a long journey and Maa clinging to me. OH! God! is it hell or heaven’ I thought. In this situation, we have forgotten to have dinner in the hotel. We directly came home. I went to my room and then to the bathroom.After the ½ hour when I came out fresh Maa called me “Paddu! did you finish bath?”“Yes Maa,.