Input needed: MIL going through our stuff

Hello mommas! So, I’m in a predicament where I may have to rely on my MIL to watch our son for a couple days during the holidays since his school is closed but she has a brief history of going through our belongings while babysitting which has led to me no longer asking her to watch our son without us being home. But now I am faced with possibly having her watch him again for a short time and I’m leaning towards asking a babysitter rather than her to watch him. I would like to know your thoughts on this. Read below for details. About a year ago, my MIL was watching our son at our apartment for a little date night. We were gone about 3.5 hours for dinner and a movie. We quickly found an issue with a couple of things after she left. (1) I noticed that she helped herself to my unopened dessert treats in the freezer and ate half of them without at least texting me a heads up or asking if it was ok. Mind you, we offered to order food for her and her girl friend (who was also watching our son with her) before we left and she expressed that they already ate and would be fine. (2) I noticed a stack of my husband’s baby photos that I had in my nightstand was out of order from the way I had left it (the frames were color coded) and my MIL’s hair was found in between the photos and in my nightstand. She sheds like a dog, and we also had intimate photos in that nightstand!! So, I confronted her via text asking her to not go through our personal belongings and to communicate with us about food arrangements next time. She definitely received and read the message but never responded, apologized, or refuted any of it — not even in person. She just acted like she never received it.