Can’t stand my MIL

not going to get into every detail but we decided to help her out with her situation by letting her move in with us and it’s been a year now, she got a job about 6 months ago and hasn’t helped with the house chores or bills which my man doesn’t bother to ask and now she just recently moved out but still has my house key and my mail key and believes she can just come over whenever she wants without notice. I had my family over and she just walks in, without calling or knocking which I thought was rude and annoying. I want to ask for my key back! I need my privacy back, I need MY HOME BACK! I am getting super annoyed with her! She has never been an easy person to get along with and we are not close or have a great relationship. What should I do? Should I just change the locks or ask for my key back ? I’m super impatient at this point I’m super pregnant and just want my house to myself!