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 lived with me for 7 months and did not pay half of the rent until the middle of that time (3 months in). When we broke up, he said "I don't think it's fair that I had to pay half of the rent at all when you didn't tell me I'd have to in the beginning. That wasn't agreed upon and I don't think it's fair that you got that money."

There was a lot that was bad about that relationship, so maybe I just have leftover anxiety, but I've been feeling guilty for requiring him to pay half of the rent starting at month 3 when I hadn't told him rent was an expectation. I kinda thought it was common sense that if you live somewhere, you gotta pay something.

He never paid for food or water, either, and the grocery bill was easily $200 more a month because the dude could eat. Do I owe him the rent money (that's already been spent on rent, so I'd have to save up to send the $2200) back since I didn't initially tell him he'd have to pay rent? 

not sending my ex back the rent money he paid