She doesn't even give you the courtesy of responding, instead taking more time to taunt you.
"Ohhhhh Lily, this is gonna be awful for you!" Mackenzie said with fake pity. "I've been fueling up for DAYS, and im suuuuuper bloated. I'll tell you what, beg me well enough and I won't fart on you anymore. You can do that, right?"
She lifts her ass off your face so that you can respond.
"Please, please don't do this to me! I don't know what I did but plea-"
Halfway through your plea she slammed her ass down onto you face, not even giving you the time to close your mouth. Realizing the danger you were in, you try to close your mouth, but the pressure from her ass is keeping you from doing so. Mackenzie looks down at you knowingly, and you realize this was her plan all along. She was going to fart in your mouth, and there was nothing you could do to stop her.
"Haha, gotcha! I didn't think that would be so easy, you really are good for nothing." You could hear her stomach rumbling, instilling fear in you. "Well, I guess theres one thing you're good for......being my little fart pig!" With that, she clenched her ass and let loose a monster fart.
PHHHHHHHPHTPHTPHTttttttttttt
It burned your mouth it was so horrible, you could actually taste the fart as it went down your throat.
"Eat it, bitch! I was fueling up for so long before this, I had eggs and milk and cheese and ice cream just for you!" You were terrified, Mackenzie was lactose intolerant and you knew those foods were a recipe for disaster. You heard her stomach rumble again, even louder this time. "Oh Lily, if I were you I would move. I'm about to release a TON of gas, and all that dairy is reallllly hitting my stomach. It's gonna be the worst thing you've ever smelled, so I would definitely try to get out if I were you."
You struggled as much as you could, but her ass was too big, and you were never a strong girl. You had no chance of escaping her. You heard her stomach rumble again and you knew you were out of time.
"Aw, guess you couldn't get out after all. Oh well, at least I don't have to taste this!"
PHHHHHT!
PBHTPBHT!
PRRRRRTTTTTTTTTTTTTTTTTTTTTT!
BLPBLPBPPHTTTtttttphtphtpht
You screamed as four consecutive farts blasted down your throat, each one wetter than the last one.
"My friends should be here soon with the pizza. So dont worry, I wont run out of fuel for my precious little fart slave."