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: My girlfriend has been going out a lot recently with her "high school friends". They had a little reunion a could of weeks ago and she's been hanging out with them every weekend since.

I thought these were just a bunch of girls, but last night she admitted that one of them was a guy. When I had the chance I took out her phone from her bag and went through her WhatsApp messages.

She was having a group chat with this guy OBVIOUSLY flirting with her. He was literally calling her babe and darling and other shit like that so I sent a message to the group chat just reminding them she had a boyfriend and saying she wasn't going out with them again if he was there. 

I was a little bit drunk, and maybe what I did was a bit extreme but I feel like it was justified. She caught me with her phone in my hands and we had a pretty big argument, and I went home alone. I just woke up now real hung over. I've still got her phone but I'm not sure I want to return it after last night lol

going through my girlfriend's phone