My DM is raising my 3 DN, she has dropped it on me that she has an app on Thursday to have her hair done and can I watch the youngest for 2 hours. She would be back around 1.45 but my DD finishes nursery at 12 and this is when I go home and make her lunch, I told her last week after being asked to take her to 2 of DN app that I am not here to look after DN as i have my own DD but I am more than happy if she needs me to take her shopping/clean up etc during DD's nursery hours then I will do so.... AIBU to say no? As harsh as it sounds, I told her not to take on the last DN as I will not be helping with them and I have done MORE than enough up to this point as it is ... I am so fed up of the only reason me needing to go round is to do something. when I asked why she didn't at least think to book the app between DD's nursery hours she said 'its all the hairdresser had' Im really fed up of it all now, my DD has no relationship with any of her grandparents, none of them bother to come and see her and I just feel like telling them all to piss of, why should I look after my DN when she cant even make an effort to come and see my DD??