When we graduated from college we decided to buy property together, and built one big interconnected house. Marian married Joe, and Clara married Paul as everyone expected. Our orgies continued at their usual casual pace. It was always the girls who initiated them. Somehow girl on girl meant time to join in for the guys. I think I've only fucked Clara on my own maybe a dozen times over the years when the guys aren't at home. Marian and I will only kiss to initiate a group fuck. Marian and Joe continued to be mostly monogamous. I've had Joe maybe four times under Marian's watchful eyes. I've seen her fucked by Paul once, and I don't think she's ever had Richard inside her.
We all decided to go off birth control at once, and we all got pregnant within a month of each other. Marian's are all definitely Joe's - but I've had two by Paul, one off Richard, and one who definitely belongs to Max (who is black,) despite my only having him once that month near my period. Clara has two by Paul and one we're pretty sure is Joe's. Richard has never had particularly big loads.
We were always open, and easy about answering the inevitable questions of why sometimes Mama kisses Daddy and sometimes Papa, and sometimes, Father, and occasionally Padre. I suppose it was inevitable that one of my girls decided she wanted a baby and she wanted Richard to give it to her. We talked about it a lot and finally decided that if that's what she wanted and every one was consenting, then it was acceptable. I knew Richard wouldn't hurt her. She had just turned 18, so we had a ceremony and Richard carried her off, and two months later she was pregnant with a beautiful baby girl.
The other kids got it into their minds that this was the ritual into adulthood though, and Marian's son wanted to do the ritual with me since he was eighteen too. I think he thought he was going to get me pregnant, but I deferred. Clara's eldest daughter couldn't be outdone and got pregnant too, by Joe. That's how it went after that.
Once sexually active the children became part of our sex life. Marian's son especially got involved in the orgies, and he was the first to break the incest line, having sex with his mom. We made it very clear that we didn't want any babies out of those couplings, and to this day we never have. Every baby has been planned - my eldest is on her third, but none by her father Paul who she does sometimes have protected sex with.
The house has grown over the years to accommodate our growing family. The new generation each gets their own outbuilding with a covered walkway between it and the main house. Because privacy isn't an issue we have no doors and outbuildings come off outbuildings.
Marian's eldest finally managed to convince Clara to have one of his, and she exclusively fucked him for about a month - three times a day, ah the endless energies of youth - but mostly unless someone is trying to get pregnant her holes are communal property. We all know the exceptions. Marian's second daughter is a little shy and although she wanted to go through the ritual she didn't want a baby yet, and doesn't participate in any of the communal sex.
The sex goes on between the children too. My eldest boy and Clara's second daughter are fairly exclusive and have two babies together and their own outbuilding. Another pair, my second girl and Marian's youngest boy, have gone to college together.
Rumor has it they've been initiating orgies among their friend group. We like to joke that we're like a cancer cell - sending out spores for the cause of free sex.
