It may have been my brother but I found myself grinding my middle against him and the change in his boxers was very obvious. Oh, very obvious.I reache...d down and slid my hand in his shorts and gripped his cock. My heart was racing, I'd held a number of guy's penises over the years, it has always been a thrill but this was even more. I think it was because we were brother and sister, the taboo of sexual contact between siblings. But at that moment, Sean was a man, I was a woman.I felt my bra come. I grabbed Mary's head and started pumping my hard cock into the back of her throat. Lauren began to lick my balls, paying attention to both of them and pulling each nut away from my body slowly sucking hard. I was so surprised but happy that I was having the luckiest night ever. Mary swallowed roughly and smiled as I started to cum in her mouth."I need this" I said as the girls slowly sucked my cock, both taking turns tasting my cum.I sat back as Lauren started stroking my shaft and sucking on. She was all in for that.we get to my place we talked and drank enjoying each others comapny it was nicenow i was not thinking about sex with her untill i asked about her husband. her husband all he wants to do is go fishing, watch tv,drink beer,watch sports i told her there is nothing wrong with that, she said there is when he wont touch,hug,kiss or fuck you she said. i looked at her that was the first time i have ever heard her curse,she looked at me what tom? you dont think i like to fuck. She replied that my mother didn’t know. Chloe was invited to go along.That night Chloe and I were invited over to dinner. Her son was sent to spend the night with his father and then we had a talk. At first I was concerned, then Mom arrived, and I became even more concerned. However, it all turned out just fine.The two mothers sat us all down and set some ground rules. First my father and her son could never know that we were having sex. Second, they would cover for us so that we were free to.