How do I Manage my mother in-law demands she hosts holidays?

I asked a previous question about my mother in-law who insists on bringing food to my home when I host holidays. This year, I invited everyone for Thanksgiving as my oldest son would be coming home from college, and want to stay home. So, three weeks before the holiday, she starts plotting to take it away and host it herself. She insists that I will be tired because I work, that it’ll be easier if she do it, etc. Husband, supported mom, again. She hosted the meal, and it was horrible. Help…