They had promised to pay for the liquor and they would even let her have some. Their parents were gone for the weekend to some veterans convention. Sh... had called Robby and he had come through, as always. He couldn't stay to party, but he told her to go ahead and have a good time. They had started drinking early in the day and had kept it up until late that night. Her stepbrothers had dared her to show them her breasts and she had agreed, if they would show her something. Somehow it had wound. Even at his age he was quite a physical specimen.At a slender 6'4",he had long arms and legs and giant hands and feet.I'de jacked a load thinking of him dropping his pants and offering me his giant cock for service.My grandmother was at my aunts home,for therapy and doctors appointments, I had her house all to myself. I was there painting,retiling and other stuff when he dropped by.I wore tight cotton shorts and T and let him in.I took a break, got us 2 beers and started a chat.I asked him. The longer it went on the more her movements became lustful until she was full on gyrating her hips, rubbing her lower back against his cock. She could obviously feel it because she appeared to be working it. I began to feel a bit like a spare part. He had taken her under his spell far more quickly and easily than I had envisaged and It was now as if I wasn't there. She leant her head around as he kissed her neck and for the first time on that night they kissed. It was like a spear through my. Carol squirted in ecstatic reaction, nearly drowning poor Denise below her. She tried to swallow, but the sheer volume and sudden gush had it pouring from her nose and mouth as she gagged and dribbling into her ears. I knew how she felt, having done the same on several occasions.They settled for a few moments rest, both overcome by the intensity of their respective orgasms. There they were, lying breast to breast, hip to hip, sharing the same air and suddenly giggling at the release they had.