Spoiler
I don't know if it will be perfect for you but a guy basically pays her for therapy to keep her out of that life. She was going to get into it but he started paying her to help keep her from it before she started. Idk if you will find that acceptable or not. She lied to the MC about it to try and push him away. That's the gist.
That still be a red flag but it avoids ntr nts. Up to to the the player if they accept it. Personally I currently see her as a friend MC is trying to help more than a LI