there's a bigger place for trust tho Bounty its something ppl earn by behaving honestly and direct, not all this. Who is being straight with you when they say 'she was nervous of any comeback on her'!!!! Intimating that you are some sort of 'what exactly' to her, and he's done that intimating, or has he? I reckon that's just his way to try to make you feel bad,
He's being nice as it was a close call and needs to hoover you. The code on his phone is to prevent you looking before he gets chance to read/delete any further texts, realising you were going to leave won't scare him into changing his ways, only being more covert, and keeping tight reins on things, and that its part of the cycle.
Unless you have actually spoken to her, nothing can be assumed, truly. It would be a very strange thing for him to share that with her unless there was something afoot, because things like this in a marriage ARE private and not just some friend's business for discussion.
We are most often better off listening to ourselves, it tells us all we need to know. If you feel you do not believe, or trust, then you don't, no matter what he's saying, you don't believe him, its all you need to know.
I just read something about only when we refer to our own instincts and feelings, rather than their influences, does our healing start.
If you are not convinced Bounty you have your answer. xx
Agreeing with Noregrets there shouldn't be taboo subjects which when entered into bring a raft of abuses to your door, and the relationship is over if you are too scared to take stuff to him! What would his reaction be if you were to say this?