My husband (married with with children) has in the past few weeks had a younger female assistant join his small work team where he is managing her. Part of his job is being present at some evening events occasionally. He had one recently and I asked who went/ who he travelled there with and he said his boss, another colleague and the new assistant. He also text me during the evening later on saying it was finishing up but I found out the next day through seeing a receipt he left that when he text me saying the work event was finishing he had actually been in the pub for an hour or so with some colleagues after the event had already ended. I asked him what it was an he initially lied and said it was part of the venue which it wasn’t. I then found out that his boss who he said he travelled and attended with them hadn’t in fact gone at all. This has made me feel so upset and worried I can’t trust him and that he maybe wanting to entertain things outside our marriage. I don’t know what to do. He lied about these things when texting me but also to me face. When I confronted him he has then backtracked and said I misunderstood what he said or that he lied because he was worried I would be upset with him spending the evening at a work event with this female assistant and so lied in these ways.