How did I know this? Well, she was my sister and I’d seen her as she grew up, in swimming suits and gym kits, things like that and for some reason I... had taken notice of her development. We had always been friends, none of the fights and disputes that happen between some siblings, we shared and looked out for each other. Then things changed on eventful, late summer Wednesday evening.I was in my room, jerking off to a porn magazine a friend had lent me when the door to my bedroom opened and. But I decided to tease her a bit. I kept my cock on her cunt lips and rubbed on cunt lips without inserting it.Mom: Son fuck me. I can’t wait anymore.Me: Some time before you told me not to fuck you mom.Mom : I am sorry son. Please fuck meMe: Sorry mom, I can’t fuck youMom: I am sorry sonn. I beg you, Plz fuckkkkkkkkkkkkMe: Ok mom, but on one conditionMom: I am ready for any conditionMe; You have to obey me and agree to whatever I ask youMom: Ok sonnnnnn. Now plzzzzzz fuckkkkkkkkkkk meI was. It's swimsuits and like that, and some of them are pretty good. She has this one line called Wild Wet bikinis she distributes. I told her about our trip down here, and asked her if she had something that was really daring. She said she did, then she got a bunch of them out of her car and gave them to me. They're factory seconds, and she said to spread some of them around among my friends, so I brought some along. They should fit, they're pretty much one-size-fits-all."She went below to her. Jim said, "I need to get more oil from the back room." A few seconds later he was rubbing the oil on me and into my hole, and I had begun to squirm around. He slowly got on the table and sat between my legs and worked my low back and ass. Then, as he had done before, he moved up and I felt his cock sliding on my crack. I noticed I was a little tighter than I had been in the past, by the difficulty he had pushing into my hole. Jim's persistence in pushing, paid off. He finally slipped in, but.