I am a 23yo step mom of one beautiful almost 3yo little girl, and Bio mom of 2 equally beautiful little girls (18mo and 6mo). My FH and I have known each other since I was 4 and he was 7. FH and my older brother have been best friends for years. After losing connection for nearly a decade we had reconnected.

He had been married for almost 8 years and that's went down the toilet when FH found out his ex had had an on going affair on him. He found this out after his daughter was almost 6mo. (The affair was nearly a year in the making) He had a paternity test done and SD is his.
FH and I got together after I moved back home from MO. It was him and SIL who had picked me up from the airport. I knew I wanted something more with him when we were on the 4 hour drive home.
I had also be married before, for almost 3 years, but my ex was very abusive, so I ran! Fortunately we had no children.
I had found out I was pregnant with my first DD 2 weeks after being home, I was well into my second trimester when I found out. I had told my DD's Bio, he wanted nothing to do with her or I. (Found out 3mo later he had knocked up my no longer best friend!!)
FH has been with DD and I through the time I found out I was prego through this day. He cut the cord and changed her first diaper. He plans to adopt once we get married.
SD's BM is still very much in the picture. Though for the first 2-3 mo FH and I started dating (SD was 8mo old when I first met her.) BM has been in and out of the picture, it seems now (two years later) BM only what's SD when she has plans with friends, so she can look like MOTY. And she uses SD to get to FH. Though it hasn't been working as well as it has in the past. BM is a real piece of work.

FH and I have one Shared daughter and another unknown on the way.
Fortunately we don't have it nearly as bad as others, but its still not easy. I just Hope BM moves out of town like she plans. Then maybe we might have some piece in our lives.