You and mommy are hanging out. All of a sudden your mom feels her stomach is getting all bubbly - she really needs to use the bathroom NOW! She won't make it down the stairs and down to the toilet so she asks you for a disgusting favor: Could she please use your mouth as a toilet, and then have you lick her dirty shitring clean afterwards? (Since MV doesn't allow this type of content to be visually shown, I'm just pushing my asshole out and dirty talking as if I was using your mouth as a toilet)