Wow Steve, that makes a lot of sense to me. ILs bought a house 2 years ago before W left. Unbeknownst to me at the time W gave them some money towards buying it. W had tantrums and constant negatively about us. At night she was sleeping right on the edge of the bed. W didn't help much at home nor made time for us. As a result I become more demanding. We would have a lovely day out and W would often go in a mood on the way home spoiling it. W deliberately tried to orchestrate arguments. I often tried to communicate about my hurt feelings and she told me I didn't feel like that.
A relative of mine died and I W seemed annoyed. I think W had already been planning to leave and thought she'd better stay a bit longer when she didn't want to do so.
W wasn't by my side much at the funeral. She got angry with me when I asked about it. I suspected she might be seeing someone else and she got very angry with me. It well might just have been her planning to leave but I'm not sure.