My girlfriend and I have been together for about three years and have known each other our whole lives. I have a breeding kink that she is aware of and exploits me with often (which I enjoy). Sadly we aren't in a position to have kids at the moment but I often spend time thinking of how beautiful she will look carrying my children. Recently, within the last month, we have started to have MFF threesomes with a friend of ours who is very close to us. We are both having a lot of fun with it but I couldn't possibly tell her how badly I would love to see them both pregnant by me at the same time. The more I've thought about the two of them growing together the more it has taken over my mind. Every time I see either or both of them all I can think about is breeding them. There's a Ginger friend of hers that we both want to fuck that I'd love to knock up too. In a perfect world, I would get them all pregnant together and be able to take care of all three of them through their pregnancies. They are all such beautiful women who would carry so so well and I'm so lucky to even fantasize about them.

TLDR; My girlfriend and I have started having threesomes and my breeding kink has spread to the friends we fuck.