Sorry this is long. My children are 9 and 6 and me and my ex have been divorced almost 5 years. My children saw their dad every other weekend, half terms and some school collections until covid hit and then it wasn't as much due to reasons out of our control, but we worked together to find solutions and it was still a good relationship for the kids. We co parented well and used to have occasional days out or he would come in for a cup of tea at drop off and it was very civil. I noticed last year things really changed with how he was acting around me and him not wanting to see the kids as much. I questioned this and was told it was all in my head and I assumed maybe it was and didn't bring it up again. My ex told me a few weeks later that he was with someone and it turns out it did co inside with his behaviour change to me and the kids. I was happy he had met someone and was hopeful he would start to see the kids more. 7 months later they moved in together, but he's now dropped to having the kids every other weekend one night and doesn't see or contact them between. I've tried to encourage him to see the children more, but he just doesn't seem interested unfortunately. The children are now saying they don't want to stay at daddy's house and they have to go in their room a lot and be quiet so he can watch tv with his partner. My oldest has said he's not like her old daddy anymore. I'm not sure what to do as my heart in breaking for my kids, but I don't want to meddle either. It's such a shame as I really thought we had this co parenting thing worked out. Anyone have any advice?