Interesting topic Kjs.
My wife and I were both still married but separated when we started dating. We both had young daughters and a lot of times it was hard for us have alone time for sex but we would find a way...lol. Sometimes it was just a quickie in the bathroom or somewhere we knew we only had a few minutes. This seemed to turn us both on and we talked about it. She said she found it "sexy as hell" when we had sex and only had a few minutes. I loved it....lol.
She found out early on that I'm pretty much willing to do anything she wants and like you and your wife things just escalated from there.
