Then his cock shot several spurts of cum deep in Moms' ass. Mom was actually having a hard time keeping her mouth around my cock with Greg and his Da...d pushing her from underneath and behind and now that they both came in her it triggered another orgasm and again Mom had to use one hand to steady herself and the other held on to my cock while she flooded Gregs' cock and balls with her flowing juices as she shook uncontrollably. Just like last time, after Bill came in Moms' ass he was spent. You'd better get on with your story, or I'll burst. I haven't been able to think of anything else all day. It's got me wondering about a lot of things, as well as getting me hot as hell. My pussy's been wet, most of the day." Well, it gets hotter. Where were we? Oh yeah! Well, the next night was Friday, and I had managed to get a date. I used some of the things Mom had taught me, and they worked. I actually got my hands on that girl's tits. After that demonstration, of the effectiveness of her. Disaster. As I feared, Deena’s not my daughter, at least from the aspect of being a product of my sperm and her mom’s egg. From the aspect of fourteen years of ‘Daddy’, she’s my daughter.Other side of the coin is that her actual male progenitor had also deposited a load in Haley’s mom two years before creating my Deena. The two of them – half-sisters.There was a little, no, a lot of discussion about Deena’s status in MY life. I told her she was MY daughter, test or no test.Life started to level. She was about a paragraph into that discussion when she stopped speaking again. I heard her take a deep breath, then in almost a whisper asked, "Peter, are you and s*s having sex?"I didn't miss a beat while fucking Melody and thought what the hell and said, "Yes". Kathi was silent for a few seconds and I was thinking I had made a big mistake but needn't have worried. I could almost see the smile on her face as she said, "So, are you loving it that you are fucking my sister while you are.