Mother-in-law Hell

I’ll try to make this a short(er) story than it is. My husband and I were married 2 years;, together for 7. He was terminally ill, so we rented a huge house in the country and moved in the entire family ,(me, my husband, his two grown step-kids and three grandkids, and his mom), so that he could have everyone together in his remaining time. While he was alive, the mil got on our nerves, so much so that he asked her to leave on his death bed! However, Silly me, I felt partly responsible for that sad, sad fact. So I went home after he passed away and told her she could stay as long as she could behave herself. For the most part, she has, that is, up until today.
The lease on this house will be up in Feb., and my dear departed one was a hoarder. I have been busy going through everything thing in the house, selling what I can because I will be moving into a small apartment in Feb. I have been open with everyone in the house about what I am doing, have brought different family members different things of his that I thought they would like to have, including his mother. I have done my best to be sensitive to everyone’s feelings as we each go about the business of mourning in our own private ways, as well as occasionally sharing our grief. I have kept up with the household bills and only asked a pittance of the others in the house to help out a little. Otherwise, I have carried the load. I also don’t get alot of help around the house from my mil.
I went into debt during our marriage, I denied my husband no small happiness while he was here.
This morning, as I was preparing for a garage sale, I was greeted by my mil who launched only what I can call an attack. I was told that I had no legal right to be doing what I was doing, etc. She even had the nerve to make one of those “turning over in his grave” references!!! I can’t describe how incensed and violated I feel. This woman LIVED OFF OF her sick son for his entire adult life. And he left her a small life insurance policy, so it’s not like he left her nothing. Her balls are so big I can’t believe she can walk!
I am just hoping to get myself out of debt.