I am a grandmother in my fifties and still working full time, I have 3 grandchildren to 2 daughters, both of them lone parents in their 30's, one is gong back to college so is in the process of changing her job to fit round this, she will be working evenings/weekends and although she is doing this she has not asked if it is ok for me to have the kids while she works ( I work office hours and she will be starting at 6pm) I know from past experience that this will be just expected of me. AIBU to not be happy about this?