Hard to sum it up in a subject line!
When DH was 17 he had an affair/fling/whatever with one of his mother's friends. She was late 30s at the time (MIL a few years older). She and MIL were very close. She babysat him when he was younger.
Now, as far as DH is concerned it was a fling, he was in it for the fun and it was embarrassing when people found out (she told MIL while drunk). This woman is still friends with MIL.
At MIL's birthday party some years ago, when DH and I were first together and I was being 'introduced' to MIL and FIL and their friends, this woman cornered me in the loos. Now, DH had already told me about their fling as an aside to a conversation about age-gap relationships. During that conversation he told me some details of how she'd behaved during their fling which made be think she wanted more of a relationship iyswim.
Anyway. If he hadn't already told me about it, what she said in the loos at this restaurant would've made it crystal clear and I found that massively inappropriate. I just sort of backed out of there.
Since then, and since we've had the DCs, I've done some thinking about the whole thing. I'm about the age she was when she and DH were shagging and I would never want to have sex with a teenager, especially a shy inexperienced one (as DH was). If she'd been a man and DH a girl, I think people would've been up in arms about it and TBH I'd be horrified if one of my friends was having sex with my DS.
DH isn't in the least bothered or scarred by what happened and I tend to keep my negative feelings about this woman to myself.
However she's just moved into our area, just a few streets away, and we keep bumping into her in the park etc. She has invited DH (not me and DH), out for drinks, keeps offering to babysit the DCs etc.
I don't like her. I just don't. She was rude to me. I don't for a second think she's any kind of threat. I just don't like her and don't want to be around her and I bet I get flamed for this but I think what she did with DH was massively wrong.
So I avoid her - when we bump into her I sort of smile and wander off after the DCs. I deflect her 'shall we go out for coffees' and I am pretty sure it must be obvious that I don't want to be friends.
DH doesn't get it at all and thinks I am being silly. He thinks she's a bit pathetic and wants someone to go to the pub with. He doesn't try to get me to be pally with her or anything but he really doesn't understand why I have any kind of problem with her.
So, AIBU?