I don’t know how to feel

So recently I uncovered my boyfriends Facebook passwords.. now I know it’s an invasion of privacy in the relationship but occasionally I’ll log in just to see what he’s been up to. I went through his activity log and noticed he’s been looking at his ex wife’s profile everyday since before we got together. At first it was fine because I still have an ex on snap and I look at his profile every once in awhile but he’s doing this everyday.. and I’m 5 months pregnant tomorrow we find out the gender to our baby and honestly I don’t know how to feel about him looking at her profile. I’m torn between being okay with it and being hurt by it. Please someone help me out…