Host parents fighting

OK, what do I do? My host parents are fighting down stairs. I don't know about what, but my host mum doesn't sound too happy. Well, who's happy during a fight? But anyway, it seems like they fight pretty often, about pretty much everything! It's really awkward for me, because I don't know what to do. And I feel so bad for the girls, their parents are fighting loud and just a second ago I could hear one of the girls running up the stairs to her bedroom. Should I do something? Go and talk to the girls, so that they might focus on something else than their parents fighting? I'm so bad at this, my parents (biological) rarely fights and when they do it's not this big. I have never felt awkward when my parents have had fights, maybe it is because they are my parents and not someone elses? Well, the best might just be to not interrupt and just sit here, keep reading a bunch of different blogs and try to answer some e-mails. Maybe...