Alex helped me with the grading. I usually took half of the papers and she took half. We met the next day to swap sets and finish the grading. I asked...Alex if she had plans for the evening (it was a Thursday night). She didn’t, so I suggested that she come to our house with Katrina. She and my son Brad could play, I’d order pizza and we could knock out the grading in an evening. Alex thought it sounded like a good idea. We got the papers graded in about four hours. Alex and Katrina went home.. I get to have sex with Diana everyday. We've had sex in every part of my house even with my brother in the room with us. He didn't suspect a thing. One night, we decided to watch T.V. (Robert will just listen) with Diana and Robert sitting at the long sofa while I sat at my lazyboy chair. Rose decided to sit with me since the lazyboy was big enough and she would fit with me. An hour passed and Rose was snoring with her head on my chest. I saw Diana was also sleeping with her head in Robert's. She could feel the head rubbing right up against her cervix. His hands were all over her, sliding everywhere on sweating wet, slippery body. He was moaning too, grunting as he thrusted up into her. He was close too, she could tell. She reached down and fondled his balls, all heavy in their huge sack, his big balls all full of thick virile sperm. And that pushed him over the edge. With a deep shuddering groan he started to cum. She could feel the spurts deep inside her, the gush of his load. Danni noticed the harness that Samantha wore had thicker, heavier straps than the one Evelyn and Mary had bought for her. She asked Samantha why that was and was told that Samantha preferred the heavier harness because she tended to be more physical with her partner than most women were; Danni's harness would work perfectly fine for most of her female partners but Samantha would use this one. Danni felt a little apprehensive when Samantha told her this but Samantha was quick to tell her that.