I seduced my Sister for my Husband

I'm Kerry 29 married to Patrick 30 and I'm now in my last month of my pregnancy. Earlier this year I had trouble had to stop intercourse with Patrick as a result. We had a very regular sex life and I didn't want Patrick to miss out on regular sex. I've one sibling Rachel 32 single rather shy and timid and she doesn't date. I decided she would be a good replacement for me while I was pregnant. I got Rachel to stay with us due to my health concerns, I'd overegged them a bit to get her to move in with us. Patrick travelled for work and was away a few days a month on average. When he went away I made a move on Rachel and got her to shower with me and then sleep with over about a month. Then when I decided the time was right got her into bed with me and Patrick and had Patrick fuck her. He was quite willing and didn't need much convincing and other the following months Rachel joined us in our bed. Only one problem came up and that was a burst condom and Rachel got pregnant. Rachel was unsure what she should do and I told her to have the child. As if she didn't with her track record she won't have any children of her own. Patrick was okay with it and after some awkward question our parents have also come around to the idea their daughters both pregnant to the same man. Rachel sleeps with us both in our bed and works from home now, I'm having a boy and Rachel a girl according to our doctors.