Now, this is about my mother, not me, i just thought i could ask here since there are probably some more experienced married women on here.

I am an 18-year-old still living with my mom and stepdad. they have been angry at each other for almost a week, ignoring each other, refusing to eat dinner with the family, 2 times yelling and 1 time him throwing a chair and storming out in rage. i think it is so petty.

they are fighting because a week ago we went to the zoo with my niece and we all hadn't eaten, we were tired and my mom said she was in a lot of pain and asked to go home before we had seen the last exhibit. we had been there for 4 hours walking in the heat and my stepdad got angry, took my niece the rest of the way without us and we went straight home, even though we had planned on going for dinner, and didn't speak a word to my mom for almost 3 days and he recently got sick( probably because of my brother and i who both got a bad cold i think so we felt similarly sick) and he was whining and at some point said his complaints were more valid cus he doesn't get sick much and my mom was being whiney.

this stuff has been going on so long, dinners are awkward and they seem to be fighting a lot. is this a normal fight? I know marriages arent perfect but this seems excessive to me. they're not kids and they're not recently married, they should have gotten over this by now right?