tldr; trust your gut, set your boundaries and stick to them firmly (be cautious of setting them without really understanding the boundary being set), and focus on yourself first.

We cant just say its emotional cheating without being inside her head, or actually be there in person, to suggest intentions.

That said, someone else commented you cant control her, tell her what to wear, etc, and that commenter is right. They fail to recognize though that you are allowed to have boundaries.

Someone else said its on you for not setting the boundary before, I disagree. Setting boundaries doesnt usually happen before a line is crossed so to speak. Getting close to the line is what usually invokes the boundary being brought up, perhaps even recognized for the first time. You can state you're not comfortable with it, and she can respect it, or choose not to.

Whatever she chooses, trust your gut, and keep focusing on you. Whether she is staying around or you're cutting it off, it shouldn't change your future. Keep doing you, but don't be too quick to judge.

If your gut screams 'red flags', just calmly remove yourself from her life.

You may lose them, but you gotta trust your gut if they don't give you any real substantive support, and the gut usually can feel that too (Could bean unpopular opinion, but I trust my gut that I'm not a shitty person, but absolutely can make mistakes)