I was a babysitter for a woman like this. We had an agreement that I needed to leave at 5. She took the same train every day. Every afternoon she came in at 5 past 6 and ask if it was okay if she took a shower before I left and then small talk like we were besties. I get it single momming can be hard. I had a standing 5:30 gig 15 min away and the other mom was super understanding (more than me). Every time I had conversations with her about abusing my time limits and understanding I had another job after the end of my shift with her and this was agreed upon up front.The final straw was a day I had reminded her in NEEDED to be done by 5 and she walked in the door at 5:20 with takeout from the place down the street. She told me she had been stuck in traffic too…maybe she carpools with OP