So before I begin, please don't even bother responding with the response of your MIL or your DH's ex can be friends with whoever they like. I know these things. They are grown women who can do what they want. The thing here that concerns me is that my MIL and I have always had a great relationship and when my DH and his ex were married she was not that close to his mother. They got along and that was it. They never went out places together or hung out or called to chit chat. Well now that they are not together (have been apart for about 10 years) all of a sudden within the last month or two she is calling to just say hi. She sent flowers to her for her birthday, not from the kids, but just from her. And I just found out that she showed up at her house recently un announced and took her out to lunch. They drove over an hr to this place for lunch, it wasn't like just some place down the street. My MIL said she was 'trapped' into going and it was awkward. Knowing this woman like I do, she cant be trapped into anything. She can talk her way out of any situation in a drop of a hat, so im not really buying that. Again, she can go out with whoever she wants. Its just strange to me the sudden friendship that seams to be developing. I know that before all this started she would see my MIL when picking up and dropping off kids but it was always brief and that's it. My MIL obviously feels guilty (even thou my husband and I haven't told her how this upsets us) because she keeps making excuses for reasons why they talk or go out. I know I need to just get over it, but it really makes me want to spend as little time as possible with my MIL now. Like my DH says, he was very close with his exs father but he wouldn't in a million years think call him up and ask him to go fishing. its just a line you don't cross. Something's up, people don't just warm up to someone unless there's something in it for them.