lulz
You seem to have one of those typical families- annoying sister, crazy dad, and whatnot... that's what makes this so funny, because people can watch it and say "Hey, I've been there!" and it seems even better because you can relate to the audience and stuff...
I actually have a crazy dad myself, only he likes making up retarded songs about everything we do. Like if we're in a grocery store, he might say "Lookin' for the lima beans, you know what that means, scenes, jeans, etc."
There's one in every family, I guess. :)