.. Well I was over the limit. We started talking to each other which surprised me considering the time but we were both in a very public place Clapham...Junction so I believed she felt safe enough and she seemed happy enough talking to me.So I decided to turn on the charm, which I did but I had too dig up some relics to have some fun with her. We sat in a park which is right next to the main road which was near her house and we kept on talking while sitting in the park and I was giving her. But she quickly perked up and said, "sure." I really thought she was just going along to not rock the boat, figuring they were just helping each other undress.I was getting turned on watching them help each other take their dresses off. Then they unhooked each other's stockings from their garter belts and slid the stocking off each other's long sexy legs. Then they took the garter belts off.It was all hot as hell to me but nothing too far over the line. But when Pam went to unhook Lynn's front. What’s up?”“You got me horny,” she complained.“Sorry.”“Kiss me,” she said.So I kissed her. Her hands, which had been by her side, mostly, and clenched a good deal of the time, came up and pressed against the back of my head. She really wanted to be kissed and the fact I was her brother didn’t matter. She also wanted to know something else. One hand snaked down to feel the front of my shorts - I’d been smart enough to put a pair on after my shower - and she squeezed the thick, turgid thing she. Dollops of cum raced up his shaft and were forcefully injected into the depths of Marie's hot clasping cunt. It felt like the stream of sperm-laden semen would never stop.Crystal stopped stimulating her sister's clit and brought her mouth back to Marie's ear, whipering: "Is he cumming inside you? Oh, you lucky girl. Doesn't it feel so warm and wet? There's nothing like it." Marie was overcome, unable to do anything but whimper in response.Finally the two came down from their exhausting.