Advice Please!!

Ok so my boyfriend has this so called "model" friend & recently he showed me some photos that she sent to him from her shoot, I felt some type of way about it because I'm thinkin about the situation vice versa if I was to do something like that I'd be wrong & she know she's wrong knowing he's in a relationship it wasn't too risky photos I just don't like that she did it, I feel it's disrespectful, what would you do in this situation?