You and Anis were crawling through a sewer to an enemy base. As you guys crawled you make a comment on the stench while crawling behind Anis

"Commander~" Anis exclaimed, irritated "What'd I say about watching your words while you're in my line of fire hm?" said Anis as you crawled forward until you bumped into her large rear "Oh~ Clearly you DON'T know. Well let me show you then~" says Anis as she clenched her butt-cheeks over your face and released a bubbly, eggy fart down your throat