LOL, I can see where she's coming from. She's being proactive, good for her!
At a party once, many moons ago, it was my perception that my then SO was flirting with another woman, but the kind of flirting that is more than one would expect at a party. My reaction was to befriend this woman. It worked and I no longer felt as if my relationship was threatened.
It can feel threatening to witness our SOs want to post pics online dressed in a way that most women dress when they want to attract men, or when our SOs befriend good looking GGs. It took me a while to fully understand what this was all about. Had I not been in love with my SO, I dare say this might have been enough for me to move on from the relationship. I had not encountered this type of behavior in my other relationships and at the time I did take it that my SO's interest in me was waning. Now I understand, and also my SO has been going out for several years now so she has incorporated her feminine self in her day-to-day life.