Babysitting mom issues

Okay so idk what happened but lately the family I babysit for has changed. I've been watching them for over a year and I know how they are but they have been completely different these past couple months. I used to only come over so the parents could work bc they worked weird schedules so I would come over for a couple hours then leave when mom or dad got home but lately the mom never works and she always tells me she's going out for one thing then I found out she's not out for that and she has been acting very sneaky and staying out very late when she knows I have school the next day at 7 am! Today she told me it would be 7:30 to 9 pm so I was fine w that but then at like 10 she texts me and says 12 so I just went along w it bc there is not much j can say. then she pulls into the house at 1:20 am like wtf!!!! She didn't even acknowledge that she was an hour and almost a half late. I don't know what to do anymore it's really annoying. Please help