All About My Mother

Your sil is so busy burying herself

I would just sit back and let her continue doing so. I would not call the “lawyer”, even if he is one. Whatever the guy’s motives, if I was a bettin’ person, I’d bet they are not good. As far as sil, the old saying applies:
The best indicator of future behavior is past behavior.
Try to take a moment to turn out the lights, sit down in your favorite chair, relax and close your eyes. You don’t have to sleep but just take a little time to relax. It won’t make it all this go away but it may help you remain calm and relaxed and keep a clear head.