This happened to your friend?!?! It sounds like your "friend" has some issues with her relationship with her mom. Her mom is old and they should probably both get over the drama and just try to appreciate each other. Otherwise they will regret it later. I know that I am young, but I remember when my Grandma passed away, how much my mom regretted not having spent some more quality time with her. The other question is if your friend is actually too skinny? If she is then her mom might actually have a legitimate concern.  Are you worried about your friend? How come you are asking these questions and not her? Did she reach out to you and ask for advice?