"You're a slut." he said "what are you." He couldn't want me to answer, could he. He moved down to my breast and bit my nipple. The pain ripped throug... me and my scream filled the room."What are you." he asked again. "Please, don't make me say it." I begged."Ahhhhh." He'd bit my other nipple. "What are you." I looked into his eyes searching for some mercy " I'm your wife, the mother of our c***dren." I sobbed.The pain was intense as he bit down hard on my nipple again. I screamed as my body was. Her breasts were thrusting up at the sky, and her head was lying on the same plane with the middle of her back. It was both intensely erotic and a little disturbing at the same time.He moved to stand beside her, holding his camera, aimed at her breasts."I tell you how to make love to breasts, okay?"I think that was the point where we stopped pretending that we had any kind of brother/sister reluctance about doing all this. It just wasn't worth the effort to try to convince him we were less than. It was some time before Amy was able to do any meaningful work on her degree.After a few weeks, they did settle into a routine of sorts, and if we were both sleep deprived, at least I needed less than Amy. I got used to pushing a double buggy (I almost said, pram... ) and got into the habit of biting my tongue when I was taken for their grandfather...I knew about milestones; the time they began to hold their heads up, the moment they were able to sit up, or roll; first solid food, first teeth. Now Carol was paying no attention to what Dawn was saying , she seemed busy rubbing and licking through Dawn's pubic hair feeling for her clit. Dawn had some thick thighs and a big spread between them to where Carol could have her face in her pussy with no problem. I was watching how Dawn would rub Carol's pussy so I could see how a woman does it.This is the first time I have witnessed how they played and it was not like I expected. Dawn didn’t have her face planted firmly on Carol’s clit,.