Thanks for the responses.

I know I really should just put it out of my mind, but it hurts. My fiance feels like he has bigger things to worry about than this, which I agree, but I still wish he'd act a little more upset about it! Oh well. Water. Duck's Back. I got this.

I've decided that if for any reason she bring up the ex, I'm just going to make a snide comment about what a horrible person she is. This is probably not the best route to take, but at this point, I don't care and my fiance said I can say whatever I want. But it's all, more likely than not, a moot point. She probably won't bring it up. And until she does, I'm going to work on not thinking about it.

I'm glad I'm not alone with crappy in-laws...