Just after some advice...
My partner and I have been together 5 years. For the first 3 years there was some infidelity on my partners part and he would message ex gfs inappropriate things. I'm not after advice on this bit as there was a lot going on during this three years (my brother died and his mum died) so lots of difficult emotions.
My partner went to therapy and did a lot of work on himself. He genuinely seemed to change as a person.
Fast forward to now, we have a 4m old son. We were sat on the sofa and he was showing me something on his phone. He quickly deleted something on his search history and thought I didn't see but I did. I asked him what it was and he finally admitted he'd looked up and ex's profile and he just wanted to get rid of it before I saw to not upset me. This ex in particular was one that he had previously messaged inappropriately. He said he'd just come across it and there had been no further action.
What would you do in this situation? I know people will just look at random people and it do no harm. I don't want to waste a lot of work we've put into the relationship but I also feel that him hiding things from me once again is an issue.