Cheating the Cycle of Life- A Padded Pony Collab

Rainbow Dash, after taking the pee bottle in her hooves, looked left and right, checking if anyone was coming throught. He only saw the entire wagon empty of any pony-like life, mostly inhabited by flies and the occasional bird coming in from the open windows and leaving the train after taking a dump on the seats.

"Cruise Speed, could you please put your pull-up back on now?" Rainbow Dash asked, as sweetily as possible "We don't want to make messes on the train, right?"

Cruise Speed immediately pulled up her absorbent garment, before sitting down to intently stare at her mother holding a bottle soon to be filled with her own pee. Rainbow Dash sighed, hesitantly moving it next to her lower parts. She squinted her eyes and concentrated on letting the banks break out.

She pushed and pushed, aching all over somewhat, feeling as if she was giving birth to Cruise Speed all over again.

"C'mon, bladder, don't be a fluttershy right now," she muttered to herself, as she pushed again, her face reddened and wrinkled in a frown, one that, clearly, Cruise Speed was having too much fun with, seeing that she was giggling as if there was no tomorrow and rollingo n her seat while pointing at her mother.

"You better not use that pull-up right now." Rainbow Dash muttered under her breath, as she felt a sprinkle of pee coming out of her and going in the pee bottle.

"Just a little more effort..." she told herself, giving one last push and biting her lip. This time, she felt her bladder giving in, a stream of piss going straight into the bottle like waterfall, the sense of rlie making Rainbow Dash sigh in ecstasy.

She peed for what felt like an infinite number of minutes, until the flow stopped, at which point Rainbow Dash showed the bottle brim full of urine to Cruise speed. However, Cruise Speed was now making her pull-up squish, which meant only one thing...

"Cruise, why did you tell me you had to go?" Rainbow Dash barked towards her daughter.

"Because I wanted to see mama use bottle!" She said giggling, before going back to touch her wet pull-up. "Besides, pull-ups are fun!"

Rainbow Dash groaned loudly and prayed that her daughter wasn't going to need to poop anytime soon.