It was muck bigger and harder than before Donna had started sucking. The massive prick looked as hard as steel, and it seemed to be hinged at the base... Donna still had a grip on the root, making it rock back and forth. The bloated knob was now the size of a plumb, shiny and purplish. Both women admired the super turned on prick. “Don't you know what pre cum is, honey?”, Donna asked incredulously, shaking her head. The young lady shook her head, finally breaking her gaze from the towering cock. He had even thought about telling his sisters to shut up because they might cause him to cum too soon, their talk was so arousing. Yet as he thought about how much he loved each of them, he was inspired to do a bit of his own improvisation. Realizing his sisters were pressing into Susan to suckle on either side, he switched from gripping both of Susan's ass cheeks to gripping one of Amy's and one of Katherine's, without missing a beat. Then he sighed, inwardly content in spite of his growing. Then my mother slowly opened the door. I gasped. In the doorway was a vision that made me rub my eyes and wonder if I was hallucinating. My mother was standing there in a matching white bra, panties, garter, nylons, shoes, and even a white wedding veil.No words could describe how sexy and beautiful she looked. I couldn't even speak."So, how do you like your birthday present?" Huh?" I said stupidly."You said you wanted me for your birthday and I have decided to give myself to you."My mouth was. After we had our sex one Friday night we went to a nice local hotel for dinner near our condo and then to the cocktail bar. We both had a lot to drink and were feeling no pain. A tall blond man started a conversation with us and said that he was from Europe and was here with a group on business. I had a couple of dances with him and in the course of conversation he said they were staying at a condominium close by. I told him that was where we lived and he asked what floor and room because.