Long story short. DH spending a lot of time with recently separated neighbour. All socialise together, but he stays on after I come home and once fell asleep on the sofa, came home 5am. Got fed up and said it's too much, must stop. He finally agreed. Then last week, when I was out, went over there and shared a bottle of wine. I came home and caught him coming out, after he had lied that he was home watching TV. Gave an ultimatum, which he accepted. When I asked what he had told DSS, said 'I've told him I'm not allowed to go there any more'. AIBU to expect more support than that, feel totally sick about the whole thing.