I'm sorry that you are going through this right now. It is extremely draining mentally and physically. Please, please take care of yourself first. I know right now it's probably the last thing on your mind as everyone around you has needs that need to be filled right now.

Do you have your own support group in place? Another good friend, relative, sibling that you could lean on to help you out so that you can focus on your MIL and family. Someone who can grab groceries, clean, make a meal, etc?).

I have an alcoholic father, so I can so relate to your situation with your mother Stay strong and don't be afraid to ask others for help!