I have a girl and a boy of which I have custody. Every weekend they see their Dad who has a new partner. About two weeks ago It was bought to my attention that his partner's youngest is continually hitting my youngest. Apparently at some points he has screamed out. They demonstrated this to me as a hard hit and the various points to which they had been hit. They had also said they had told my ex on numerous occaisions and he had asked her to stop, but hasn't really done much else to stop it.
I tackled him on this the other day, to which he replied that she has never hit him and they have a great time together. I continually probed until I asked if that meant the children were lying. He didn't acknowledge that. He only said he wanted to talk to them in private, which makes me wonder what he would be trying to say to them.
If he continually ignores this am I within my rights to refuse him access until he at least attempts to tackle it? I understand children have these phases, but if he is seeing it and doing next to nothing I worry for the long term effects as my youngest is already showing more aggressive behaviour following this.