First post, I really need some advise from an outside perspective please. My dd is nearly 12, and me and her dad have been separated since she was 1. Few hiccups but generally got on ok. We both got in other relationships and had other children. Problems have started since new gf came along, he stopped seeing his ds altogether ( I'm an outsider so can't comment on situation but me and ex are now in contact so the kids can still see each other). His relationship is not my business, but he has now gone from having dd once overnight at the weekend and once in the week after to school to seeing her once or twice a month, cancelling on her last minute and has now chosen to spend Christmas with the gf instead of our usual arrangement of split Christmas day (personally I am happy to not have to share her, but I feel bad for her as she's always enjoyed this). Do I say something to him and tell him to sort himself out as it's upsetting my daughter or do I just grit my teeth and hope she makes her own decisions?