Dad's Calling Names, Family's Falling Apart

So, my sister called me this morning from Costco. She ran into Dad, who looked at her and asked "how's the little [name of my aunt]? That's what you are: a little [name of my aunt]." Now if you've been following my blog, you know that my family fell apart because of arguments between my father and my mom's sister, who my father despises, so you can imagine what an insult that is. Then, he just walked off.

When I spoke with Dad later in the morning, he told me the whole story and like trying to argue with me. Then, he got off the phone.

I don't know what to do. I feel so depressed to have the rest of my family fall apart in this time where we really need to be sticking together. I called in Dad's best friend to help, but my sister is almost definitely going to go to Florida when I'm there. So, I can stay at their place, however, it'll be weird and won't get to see my niece and nephew. My sister is going to stop going to dinner with my parents, which means Dad will have to stop taking Mom out.