My husband has a work event/party coming up and originally said he wasn't going because he'd have to buy a new suit and didn't want to spend so much money before Christmas. I said last night that I'd seen some on sale and he decided to order one and go. I asked him if work had paid for a hotel (they usually do) and we live 60 miles away from the event. He said no he was staying at a friends. A woman he works with who lives close to the event, I looked surprised and he said they are friends and she has a boyfriend and sort of shut the conversation. This is the first time I've heard this woman's name, we got married last year (been together 10 years) and he invited close work friends so you'd think if they were that close she would have come up in conversation. If I bring this up I'm pretty sure it will escalate into an argument and the issue will be seen as mine. AIBU to think this is inappropriate or would others feel uncomfortable with this?