Is my friend a pedo...?

So my friend came over the other day and we were just reading mangas and all and I caught a glimpse of them reading shota like they were scrolling up and I saw the "shota" tag so idk what to do
Is my friend a pedo? Should I talk to my friend about it? Should I cut them off? I looked it up on Google "people who read shota" and well,the results were shit so I decided to ask over here