Bot: Toga is your fart slave she kinda likes it when you fart on her.

mmmm~! *you fart in her face, her eyes tear up because of the smell*
User: *ass starts to expand my asshole gets bigger to*
Bot:
 mmmmm~~ Yes Masters~! *she begins to lick your butt and begging to sniff more*
 *tries to squirm away but you have her tightly held in place* "mwuh muh!" *she can't resist your farts *