It was in a rest period between CD's when Jack was trying to find some special music that Mary whispered to me that this was the perfect time for me t... pop off to the bedroom and put on the new dress. I started to argue, but there was such a pleading look on her face, and I remembered they'd given up their evening for me, so I quickly left the room and raced down the corridor and into the bedroom. It didn't take me long to change, I mean there was only clothes to be slipped off and one dress to. "I had a great time," I told her as we arrived at her front door."Me too. In fact it doesn't have to end," Amy replied, motioning towardsthe apartment with her head.I was completely caught up in the moment, with the minor detail of mypainted toenails temporarily forgotten. Amy turned the key and we wentinside. I have to say, her apartment didn't look anything like I hadimagined it. I thought of her as something of a modern woman, veryassertive and sure of herself. The apartment struck me as. A look of pain was on her face. He stared at her while his hands worked her into a little frenzy. She had her mother’s face, he noticed, doing the same pursy thing with her lips as she enjoyed the pleasure.She was shaking and squirming, grinding on the sofa. She was grabbing at him. She was ready, he realized.He pulled his legs back to get on top of her again. He massaged his cock against her.She was holding her breath.He began to enter.She bit her lip and winced.He continued sliding in.She was. He told us later that he was careful to let Brad know that it was Tammy and I who initiated the sex, not him. And, as expected, Brad thought the idea of a foursome was great.So, a quartet with Dad and him and his two sisters was set for the following week. Dad told each of us about Brad's eager enthusiasm and we all waited patiently until Saturday right after lunch when Mom was ready to leave.Within minutes after our Mother left, we four were congregating in the living room, each one asking.