My (18F) girlfriend is a very independent woman. She will speak her mind in any setting and to anyone. I (21M) often feel like she doesn't see her fault in situations (I'm literally such a pushover and I haven't talked to her about it) 
But her mother was in a car accident. She was pretty beat up and a lot of people were around in the room she was in. She was very rude to basically everyone for a multitude of things. 
-talking, either to her mom or each other (family not nurses)
-making jokes
-anytime her mom, who was injured, talked/asked thing

The main thing is that her tone of voice was just harsh. It came off as very bossy. Her father made the comment of "you need to stop acting like you're in charge around here." Which agreed with but didn't say anything (*again, I am literally too scared to say anything, not even sure why. I'm worried about making her upset*)
I know I need to work on and practice actually being a man and sticking up for myself and putting in my thought to this relationship.

Do I excuse her behavior because I'm aware her emotions were through the roof given the situation? If not, how should I approach this?

I am sorry if this doesn't fully belong in this sub.

And lastly, this is a throwaway. H, if you see this, sorry for not being a man and confronting you. I love you. 

Tl;dr - GF had a bad tone to everyone in the ER while her mom who was in a car accident was being cared for. Should I excuse the behavior or confront her? 