Full disclosure I’m DHs 3rd wife. His first two marriages broke down because he was unfaithful. (Not with me).
He has a second phone. His first phone is a work phone and the second phone he bought to play a game which he has been addicted to for years (chess). He did play it on his work phone but about a year ago he bought this second phone, apparently because his work were monitoring phone use and he didn’t want personal apps on there (although he does use it for lots of other stuff it is his main phone). When he first got the new phone he was on it quite a bit playing chess. Not secretive with it at all. I haven’t seen him on it for months. About a month ago I noticed the phone had moved from his bedside drawer. I asked him where it was as I thought one of the kids might have it and he said he’d been playing chess and left it in his office.
I’m not even going to try and make up a lie about snooping on the phone, I actively went looking for it today. I found it eventually in his office, in a bottom drawer (not hidden but not on view either). It’s fully charged but has a 10 digit pin to even get into it. I wouldn’t even know where to start to unlock it.
Just this alone and his history, would that get your suspicions up?