It still felt good, but I did start to panic because I didn't know how big it would get. I feared that he would also get longer, but that never happen...d. He just got what I now know was his knot. It was something very nice about how it filled me up.I was in the midst of another orgasm when I heard a car. I peeped out my bedroom window, and saw Mom getting out of the car. Darn her, I thought. Well, I was going to have to stop this and get dressed. I guess she came home early to be with me.Only,. He has one of the greatest looking cocks of all time and boy does he cum. One day my girlfriend and I were eating lunch in West Hollywood when Peter walked in. I could not believe it; here was my all time porn hero right in front of me. I decided at that moment I would ask him if he would like to fuck my girlfriend. It took guts and his reaction more than startled me. "Where is she" he asked. When I pointed her out he quickly agreed. Now Mary is beautiful but in no way a stunner. She is 5'6". I guess I just wanted to know how far Mom would go when playing our little erotic games. For a moment she hesitated and I half expected her to say no."Doctors orders?" I smiled. "Doctors orders, Mrs. Peterson."*Never in my wildest dreams did I think our adventures collecting my sperm would end up with us doing something like this. This felt like another red line moment as I watched Mom crouch on the bed with her spectacular bare ass facing me as I knelt behind her on the floor. Reaching behind. I told her it was ok and I had enjoyed watching them have fun and there was no real harm done as she had been willing, her orgasm had made me realise that she wanted him to do it and she could always think of it as a new experience with a man.She blushed slightly at my reaction, realising that I had approved from the start and so she confidently asked me if I had realised how much semen he had splashed over her body before he had finished and we both ended up laughing when she admitted she.