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: (Sorry for bad English) 

So my mom and I are neighbors. We often come over and borrow things without asking, but return them fast(we leave a note) 
So I was sitting her house while she was on vacation. My sister was at my place while I made dinner. I noticed I was low on tomato sauce, so I just went next door and took a can from my moms pantry. Also I borrowed her vacuum because mine is broken. 

I replaced the tomato sauce the next day and also put her vacuum back. 
My sister said nothing. 

The first thing she tells mom when we meet her at the airport is: XY stole your vacuum. And things from your pantry. You should check when you are home and give her a list with things to replace(in an absolutely NOT nice tone like in our childhood, when she wanted me to get mom mad at me for things my sister did) 

My mom just said it’s fine we always do that. 
I’m mad at my sister because she didn’t ask if that’s ok and just told mom. 
Now she is mad at me because she “was totally right and it was still stealing” 
Mom just says just get over it... but somehow I can’t :/ AITA? 

being mad at my sister for telling mom I was "stealing" things from her house