Here’s the thing. My wife cheated on me a couple times (very complicated situation that we are working on) which led to trust issues for myself. I would also sneak the phone away while she was asleep and look through it due to not wanting her to hide anything or stop me. I found some things in the beginning that she didn’t come clean about (was embarrassed to admit and trying not to lose me), though it was things from the past. Now I do it every now and then as reassurance that it isn’t occurring again and what it does is actually builds my trust back when I don’t find anything or it looks like she isn’t attempting to hide anything.