Guilt trips for standing upto her, I’m tired

My MIL is single and lost her job 1.5 years ago. She couldn’t afford her own place , so we let her live with us paid for all her living expenses until she landed a new job which was 6 months ago when we asked her to move out.

She always created chaos when she visited in the past and fought 24*7. We did not have guests over when she was here due to her constant presence and interference along with constantly wanting to interact with our guests. While this irked me, i tried to understand.

My brother and I are very close and he’s coming to visit me from overseas for a period of 3 weeks. We requested that she move out before he comes so that he can spend some time with us and spend some time with his nephew. At first, she said ok and booked a flight to live with her brother. As the time to leave came closer, she asked if she could live with us for 10 days while my sibling was here because she needed to spend some time with her friend who was diagnosed with cancer. She modified her tickets and delayed her trip without asking us.

She reached out to me when DH wasnt around saying that her friend needs her. I was at a loss and didnt say much because i was extremely upset, left the house to clear my head. When DH told her she needed to leave she started screaming and sobbing.

DH felt terrible because of all the guilt trips. We are empathetic for her friend but want to make the most of this time with my brother since he doesn’t travel often due to medical issues. We agreed to let her stay for some days to blow the tension off since we didnt want to end things on a bad note and that we would adjust. When we told her it was ok to stay, she said it was extremely disrespectful to ask her to leave and that she would be gone and that we should not worry about her while crying and sulking in the house and acting like a victim.

I’m so emotionally drained because of this woman, im pregnant with baby #2 and i feel like a terrible person and feel like this is all my fault. I feel great that DH always takes a stance for me but it just sucks on how she manipulates the whole situation to come out looking like the victim. I want to support my husband and remind him its not his fault.

Has anyone ever been in such a situation before? How do you deal with such a person?