So I (32M) and my wife (29F) have been together for 5 years, less than a year married. Everything has been great lately, we have amazing sex multiple times per day, spend all of our time together and text each other whenever we are apart... I should say that we have always been very open with sharing our phones with each other, in the sense that I gave her my passcode and passwords and she has given me hers (we don't scower through them though, just freely open for either person for any reason)... But over the weekend while she was out of the room I went to unlock her phone to see that she had changed her passcode... Idk what to think. She has used the same passcode for years and now out of the blue she changed it without telling me...

I want to ask this sub before I confront my wife about it... Could there be an innocent explanation for this in a healthy LTR? Should I be worried that she has started talking to someone else? How should I proceed?