Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: Long story short my ex and I had a less than amicable break up, and she continued to bother me until finally I told her to stay out of my life and that I never want to talk to her again.  About a month ago I was on bumble dating and a profile for her popped up.  She has a history of cheating, and cheated on anyone she has dated, myself included.  Would I be an asshole if I messaged this guy through an anonymous insta account to tell him?  Idk if they have some situation worked out or whatever, but I felt i would have wanted someone to tell me when she was cheating on me.  But I’m just torn if I should just stay out of it, or help a potentially oblivious guy out.  Unfortunately I forgot to take a screenshot so I don’t have the proof :/

telling my ex's new partner about potential infidelity