Your latest exchanges with your W sound positive. Good you didn't think about changing your plans to accommodate hers.

I wonder what's wrong with her health. This is definitely impacting her mood/thinking.

Also, it's weird the IC hasn't called. They usually call within 24 hrs. Maybe it's time to find another IC, but let her figure that out on her own.

Can you talk to SIL to back off a little? I think she might be doing more damage than good. My take from an outsider's perspective.