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: I was at Costco with my SO the other day, and as is Costco tradition the lineups were long. Probably 10 or so people waiting at each till, but the lines were moving so it was probably only a 10 minute wait. 

My SO decided to go stand in line by herself, asking me to go grab the last few items by myself, and then bring the cart up when I was done. It didn't click with me at the time what her plan was, I figured that she just needed to run to the bathroom or something.

So I get to the tills, and I see her way up at the front, 2 back from the front of the line. She motioned for me to come up and join her, but I didn't feel comfortable bringing in my fully loaded shopping cart in front of the other 8-10 people, so I took a spot at the back of the line.

When we got out of the store, she was pretty livid  with me. Basically we were doing a "quick" Costco run, making a simple dinner and then she had plans to go out with her friends in a few hours. Her argument revolved around me wasting her time by not bumping into the line beside her and making her late for her night out. It wasn't a special event or anything, just a normal girl's night, so what's the big deal if she's 5-10 minutes late? Funilly enough, this devolved into a big fight about how her time is valuable, and I'm more than welcome to waste my own time but not hers, which ended with me leaving before dinner, giving her a full hour of free time that wasn't in her original plan.

I'm of the idea that it would have been rude to bring in a full shopping cart in front of all those people - I would be pissed if someone did that to me. I do see her point that she was feeling pressed for time, but is 10 minutes worth that? 

You tell me Reddit, am I the asshole here?

cutting in line at Costco