His ex girlfriend on his Facebook..

Sooo there’s no question of cheating or anything but I still find this annoying. I don’t use Facebook much but my s/o of almost 2 years does. I looked up his page just from google to show my mom pictures of his little niece from Easter and all of his cover pictures are of him and his ex, and like some romantic ass pictures. Made me uncomfortable. How should I address it? Should I even? I don’t want to act crazy but I’m definitely bothered. Help me out ladies.

EDIT: I texted him because I won’t see him until Monday and just said basically what I said on here but in short, and he just texted back “ok I’ll delete them” so I definitely think he thought I was mad or being crazy. Awkward.. don’t know how to play it out 😅