It's not selfish and immature to protect her from a predator. I meant her perception would be that I was selfish and immature for spying on her or for invading her privacy. I am battling perception and reality at the same time.
If she denies it again, do I show her the emails? I will confront her about the OM and have before but she said he was just a friend. I will be more forceful but if I pull out the emails, she'll know where I got them from.