Op here- I don’t have the exact text but she said I am always wanting the next thing, the next baby, the next house. We had three babies, each in two years, and moved twice during that time for bigger housing which is what she is referring to. We have decided to move out of state much farther from her this summer and she apparently blames me for that even though my husband was the primary driver of this.
The initial issue really was minor. She was supposed to arrive at dinner but I thought it was earlier. No big deal on my end, either was fine. We were available at both times and the kid was happy to go with her. Also, I missed her phone call when she called to tell me she was there to get the kid, so rather than knocking she got angry, left me a mean voicemail, and drove the three hours home while apparently sobbing (she would not accept my calls but accepted my husbands call)