Would you break up with your girl if she

Yell at your mom?

I was talking to a dude i know who said he did this with his girl because she cussed out his mom and it was on his mom birthday.
for me it depends on who was wrong in the situation and from what he told me was he owed his mom money and when she came over to ask if he had it he try to make up an excuse because he was broke but before he would say anything
his girl jump up and started cussin he out with made him mad.