'A Kosher Slaughterhouse Out in Fontana' - Season 2, Episode 7
Charlie and Alan hire Berta's sister to cater a party their mother has conned them into throwing for her.
Air Date: November 7th 2004.
Charlie: (Hitting Alan with papers) Are.You.Happy!? Now we have to throw a party for your crazy ass mother.
Alan: But she's your mother too.
Charlie: How do you know? I could've been adopted.
Alan: You wish.
Charlie: I do!