Well, I'm not in love with him and never was, really, it feels to me more like he's a good friend, like another one of my female friends.
There is no sexual attraction on my part, the sex happened because I was lonely and incredibly upset. It was good as far as the actual physical sex went, but there is still no attraction for me.
I still love X even though I shouldn't so it wouldn't be fair.
Also, BIL is my kid's uncle so it just wouldn't feel right.
We get on great, but the one time we crossed the boundary, it just caused stress and arguments.