HELP ME PLEASE!!!

Okay, this is a long story but I really need help with this. So one of my friends is having like "h\*rny" online chats with another girl. The thing is that I saw one picture that her new friend sent her and it looked suspicious to me. So I used Google lens and I found that picture around Reddit and X. I would love to tell her because I think someone is catfishing her to get her n\*des, but maybe it's just a coincidence and I don't wanna ruin a relationship... I have another picture, but I can't find that one around the internet. So, please, PLEASE, if someone can help me with this I'd be really REALLY grateful.