During lockdown it became apparent that a friendship I suspected my DH was having with one of his clients was blooming - through phone calls he wouldn't answer when I was in the room - "Oh I'll ring them back later." and shifty answers to questions I was asking. I have felt uncomfortable about this woman for a considerable amount of time but it was nothing more than a gut feeling - no proof and nor did I look for any. I trusted him - so why would I need to snoop? Anyway, I eventually tackled him head on about it and he admitted they were friends - he would go to her house to do odd jobs (as she's on her own) and chat (as she's lonely and has no friends). This was happening about once a month. Hmmm..... curiosity of course got the better of me and after detective work Helen Mirren would be proud of I established that a very close friendship had developed over 3 years which amounted to daily phone calls and texts and him coughing to visiting her once a week. He has lied at every stage of the disclosure so I have had to be smart and find evidence that he can't dispute - a horrible thing to have to do. He is adamant that there was no inappropriate behaviour (sexual) but they were very good friends. I have asked him to stop all contact with her, which he did at the beginning of May - except for a contact to him from her, which he immediately told me about. (She's now blocked so will have to make a special effort to contact him).He has apologised at how upset he has made me (I'm devastated about the breach of trust, lies etc), agrees that the level of the contact they had was completely inappropriate has promised this will never happen again, says he's embarrassed, ashamed- but can't seem to get his head around why I feel so upset. He refuses to talk about it anymore and has asked that I don't talk to anyone about it as he's so embarrassed and couldn't face any of my friends or family if I told them. He admits we were drifting apart - i agree - and he felt he was coming second to my family. My Mum had terminal cancer for some of the time and obviously I was helping my Dad care for her at home until she died. Understandably - that was my first priority - but this was 18 months into their friendship. We have been together for 16 years and he's not done anything like this before. He deleted most of the texts so I can't read them but the ones I have seen are general chit chat and about work stuff. He says he deleted them because if I had seen them I would have been upset/ annoyed and he didn't want a big discussion about it. I am struggling - I feel like the last few years have been an absolute joke - I've been getting on with life and in total ignorance of this friendship. I am really angry and upset and I don't know how to move forward. Things between us are surprisingly good on the surface - he just wants to forget it all and move forward - so do I but I am finding some days easier than others. Has anyone else been in this situation and any tips for moving forward?