I'll give details, but I tried DBing her. It seemed to calm her down. REALLY REALLY STRESSED.
Well, I think DB'ing your MIL is a positive. Good practice. I'm sorry she's treating you that way, though.
Hope your S feels better. At least you were able to spend a lot of time with him while he was feeling well. Glad you're taking him to the Dr. Just out of curiosity, I wonder how your W is going to handle these types of situations when she has your S?
When you W comes, it's an opportunity to act "as if". Act "as if" she had a good trip and she's happy to see you. Re-read this part in DR if you need to.