I m23 saw a video of my girlfriend 25f giving her ex a bj

1 male23 her female25 So context we have been together for about a bout a month and a half. Everything was going decently well our dogs get along we have been great conversations and a decent sex life. But she wanted to see my pictures last week so I let her I have nothing to hide I don't keep nudes or anything like that. But 2 days ago she wanted to show me some pictures on her phone and she scrolled past some pictures of stuff guys had done to her in the past. Hand prints on her ass hickies on her ass then a video of her sucking some guy off. I was upset at the fact she laughed about them being on her phone still and how nonchalant she was about just casually scrolling past them. turned it into a fight and now am contemplating breaking up with her. I close my eyes and it's all I can see. I can't even look at her in the eyes anymore, I don't want to break up but I don't want to be miserable in a relationship like that either. She said she would delete them but the damage is done, I'm not oblivious to the fact that we both had previous partners but why keep stuff like that? AITAH? Should I break up with her and move on?