I've been through a strange, upsetting experience. In my case it was because of a female co worker of my DH. They shared an office for a year before she got made redundant and I sort of knew they were friends (He even told me they had a flirty friendship - but I thought our marriage was strong and laughed it off). However, I got a very bad feeling about her on the rare occasions I would be at a work gathering with my DH. She would only greet me politely then wander off. I noticed that she never spoke to my DH in front of me. I talked about this with him and he seemed to understand. He said he'd be careful around her.
The following year he got a new job but his small group of friends from his previous workplace (including her and me), met up a couple of times a year. After about 18mths we were all having Xmas drinks and another friend mentioned he hadn't seen her since a lunch with her and my DH. She immediately tried to shush him as if it was a secret. It turned out my DH had been emailing her from work 2 or 3 times a week.
I knew nothing about it. They were just chat and industry gossip but it was in secret. He claims to have no idea why she thought it was secret. He admits that he knew that she fancied him and flirted with him a lot when they first met but they were just friends. He never spent time alone with her but the whole situation has caused many problems. Mostly the secrecy and of course the fact that she thought it was secret, him claiming he has no idea why she would think that, other than "perhaps she hoped it was because she wanted more". I feel really uneasy about these coincidences. Should I believe it was just a friendship?