Do you consider flirting with some cheating if you are married? Does flirting include sexting (in comments)?
Flirting is OK...to a point. Sexting is not OK...ever.
It's called an emotional affair, and can be just as destructive as the "real thing" to a relationship.
Stay faithful in all ways.
Can you show her what you're doing? If not, re evaluate.
What if it is her and she claims it is really "innocent"?
Only you can decide that brother. I tell mine, I won't check to see what you're doing, if you think the grass might be greener, be damn sure, cause once you go, you're gone, and I move on. But, no, if she flirts, so, nude pics would prolly be my line
It's cool I guess. In her favor, I can't even get lucky enough to sext anyone... lol. Remember the Dog's a$$ wrinkles...
If it truly is innocent, then it's like Bob said, she should be an open book with you. I never speak to another man via text, Facebook, in person, whatever, in a way that I wouldn't feel comfortable with my husband knowing about.
It sucks that you're dealing with this. :(