I've NC for this as it's outing because I've posted about my son's behaviour in the past.
My 6 yo goes to his Dad's every weekend, although it's meant to be 2 nights (although no court order), I often ask him to come home after 1 night.
Ex has had several gfs, the new one is the second gf my son has met in the last 12 months. Ds has behavioural issues and a tic, although he is not ticking rn. Ex makes no effort or association with school, and when I explain that ds behaviour has been particularly bad, he dismisses me and says he can't see the problem. I told him the headteacher is keen to have a meeting and he acts as though I am making it up. I work closely with the school and arrange meeting to discuss ds behaviour. I feel the hard work is often undone at the weekend.
Anyway, the reason I'm posting is ex has moved in with new gf. I only know this because my 6 yo told me. Apparently she lives in a flat with her 2 children 8 and 10, have a cat and xbox and play fortnight and CoD. My ds had been playing fortnight there which I made very clear should not happen, ex knows this but let him play with older boys. And the real crux, ds is sleeping in the 8 yo single bed with him. He hasn't got his own room, or even his own bed. He comes home with red eyes and looks exhausted. He came home wearing a pj top as no one could find his clothes.
I don't know what to do, I don't even know if I can do anything. I don't know if I'm BU. I feel awful for my son, although I know he probably sees it as a fun sleepover. I don't know whether to talk to school (They've got a KW place just now). Any advice would be massively appreciated.