Sister-in-Law Hid My Shoes to Stop My Daily Walks | AITA

Sorry if there are any sentences that are missing words, this was over 5000 characters when I first wrote it so I had to edit it down. She is my SISTER IN LAW not my sister.

My SIL has three little ones, and her husband (my step brother) had to leave the country for work for a few months. I offered to stay so I could help her out where needed, and she happily accepted. I live across town so not THAT far.

I was there for 3 days when my SIL commented on me going on daily walks. I have taken a daily walk of at least a mile since October 2018. Yes, even with a cold, yes, even in cold weather, yes to all of it. On nice days the walk is usually 4 miles. At my SILs, I started taking a path that was about two miles.

I asked if she wanted me to watch the kids while she got some exercise and she scoffed and said she was too busy, but it must be nice. I was a little puzzled since I was offering to help. But the comments kept coming. She kept trying to poke holes. “But it’s not REALLY a mile every day right?” and “What would you do if you broke your foot? Would you get anxious if you couldn’t take a walk?”

Then one morning I couldn’t find my shoes. My SIL woke up an hour later, I was eating breakfast with the kids, and I asked her. She told me to go check the back door, and when I’d gotten back, she pointed at them by the door and said I must have missed them. I took my walk after telling her that her joke wasn’t funny.

She was annoyed when I got back and told me that she thinks I need to see a therapist over my anxiety/obsession. I told her that I do have a therapist, and she said I clearly need a new one because this one isn’t helping. I asked her point blank why does it bother her so much if I want to take a walk? She said I was supposed to be there to help her with the kids and I’m disappearing for hours at a time. I told her that my walks take about 30 minutes, and I’m doing it while they have down time.

I put my shoes in the guest room with the rest of my things and they were gone the next morning. I just said fuck it and packed my things and left. My SIL called me when I was on my way home and said I was overreacting and being childish and this is why I am single and alone. I told her that I don’t play these stupid games and that I would still pick up the girls and stay until she got home from work but that she’s on her own for everything else. AITA?

edit: Ok I did not expect to be told I’m NTA to this degree. I thought a lot more people would have arguments why I was since it has to do with taking care of kids.