"Ok, Buckle up people. We're gonna ride non-stop all the way upstate." 

Danna began pushing the trucks pedal, driving out of the gas station and into the open road. Unfortunately you can't see any of that, as you underestimate your sitting arrangements. 

As it turns out, their thighs were too big and too fat to get a proper seating position. Your being pushed around on the road, bouncing between Danna and Tanna's mighty sculpted and thicc thighs, pinning you between each other.

You wiggle a bit to get up front, above their thighs. Eventually reaching their stomach levels, enough to not get crushed or be pinned under. Though you still can't see the open road on the front, only on the sides are clear.

But as light shines on the trucks rear-view windows had you realized a new problem arose. Things are getting hit in here.

"Hey Tanna? You said you'd fix the A/C didn't you?!" Danna began huffing, stretching her overalls revealing a bare naked cleavage with some ductape pasted as makeshift covers.

"Fuck, I did. Must've broke down again." Tanna huffed, pissed off as she bangs the A/C, "Fucking thing always broke."

"Hey, sorry little hitchhiker, no A/C ti'll we get to a garage or somethin' akin. Best you get your water. It's gonna be a long ride."

You feel a sense of foreboding coming, you'd hope you'd be wrong.

-

You're unfortunately correct, 3 hours in and they started drinking.

Tanna apparently packed some beer cans under the seat. It has a makeshift cooler built in apparently, courtesy of the twins customizing their trucks.

Unfortunately it made them woozy and very drunk.

Thankfully, the open road is pretty straightforward. So she place a brick on the pedal and let go of the steering wheel, probably the most irresponsible thing you'd have ever since.

"Ughhh.... It's so hotttttt....." Danna's tone became slurry, her eyes seems tired, and her body was hot and sweaty, literally. It wasn't any different with Tanna, but at least she looks happy.

You on the other hand, was burning. It felt so hot in here. Like a sauna, but smells awful. Perhaps you'd ignore the smell of greasy food and mixed up oil inside the truck, but now with the heat the smell worsen, making you gag on reflex. 

You held on however, mustering your strength to power it ti'll the end. That would be the case, if the next thing you faced didn't happened.

Pbfftttttttttt.......

OH SWEET GOD WHAT IS THAT SMELL?! IT WAS SO VILE, SO DISGUSTING!!

Pbfftttttttttt!!!!!

FUCK IT'S GETTING LOUDER!! AND NOW THE WHOLE PLACE REEKS OF SHIT!!

Your composition broke off as you gag more and more, trying to puke it out. Before that however, howling laughter can be heard between the two trucker ladies. With tears pouring down their eyes and cheeks so red with both embarrassment and joy, a mix feeling made out of being drunk.

"Pahaha! Oh man, you... Should totally see your face, it's cute." Tanna commented first.

"Oops, Guess I let one out too much..." Danna said with a grin, faking guilt as she looks away.

You outright commented on the smell, insulting how nasty it is and how gross and inappropriate it was. It looks like they took offense to that.

"Well that's fucking rude as shit. We gave you a ride, hic, and this is the thanks we get. It'z not like we could hold it!" Tanna commented

Suddenly the ground, or rather their legs moved away, dropping you to their stenched seats and eventually sat on you.

Danna was pissed off.

"Oy, stop moving around, should've been to the bathroom first. Can't blame our tiny hitchhiker if they're complaining. Also where's the little fella?!" 

Tanna looked around a bit, before another gas erupted from the seat, and she waft it all the way to you.

"Ugh, think they're here somewhere. Hold on, ugh..."

Another nasty spray of gas launched at you, and you were already choking hard from the last one. The spray was vile in every sense, and the weight of both these gals ass did not help you at all. In fact, the sweat pouring out made the place damp enough it entraps their gas, fully enclosing you in a makeshift fart chamber.

Then Danna started farting a lot, and the both of them giggled in glee, making this nasty torture a competition, eventually forgetting their tiny passenger, having to take all of this smell in. Before being K'O'd by it.