Husband of 20 years got too close to a Co worker a few months ago, secret messages etc but claims nothing more than that. They still work together which is a huge issue for me. They are attending the same work function this evening and I just feel physically sick at the thought they will be together having fun (there will be other people there), he will be staying overnight in a hotel as he often does as travels a lot with work. I feel like I can’t move on from the betrayal I feel when there is still contact but have been coping a night out though is sending my anxiety through the roof. He is in a specialist industry so changing jobs not that easy and he maintains that I read too much into it and that there was never anything really going on (he said he was talking to her about issues in our relationship) and that there is no more contact like that