I've been married for 17 years and the OH has been very secretive over their phone for the last 4 weeks, having never ben in past, their password has changed and they will never leave me alone with it. Messages are pretty much constant from when they get up to 10pm as 'she's being respectful' with a new work colleague (new project on the go) and when I left for a week of work they went stay with this colleague at their house to 'get work done' and 'watch the night sky'. They lied they were there and only admitted it after I asked why the cat had been out all night and not fed. They are promising nothing happened and I do believe them, we have never lied to each other and they now lies are the worst of all sins to me. They said the friendship would slow down as it was hurting me so much but as soon as I leave the room they are back on their phone. Last night they stayed up till 2.45 working and the next morning (very wrongly I know) logged into their PC i checked whatsapp which I had looked at the day before. Before I looked at what they said there were 105 new messages (all read) from the the last PC log in the night before. I know I have misplaced trust by logging in and checking, it's very very wrong and I feel awful about it but my instincts are screaming that this is more than just work. Are over 100 messages too many for a very urgent and complex work thing? I feel like I am going round in circles and dont now what to believe.