She punched the wall and left a hole in the shape of her fist.
Is there a reason she punched the wall?
She was mad about something.
Wow, she must have hit that wall really hard. This is why you don't lash out when you're pissed off. You're likely to hit something and break it when you really didn't mean to.
I was going to fix it, but now I'm just going to let her fix it for herself.
Sure, you can even help her fix it if you want to. Maybe that would be a good project for you two to do together. It would give you a chance to talk about what made her so angry.