Mrs. Howell: "Great. I finally have to shit."
Mary Ann: "Of course you do. We are in the middle of the desert with no toilet paper.
Mrs. Howell: "I will not take a dump on the side of the road. I have my limits." 
Mary Ann: "I would."
Mrs. Howell: "Oh man, I really have to shit. Fuck you, God! Fuck you!"