"Ugh, what the heck's taking her so long?" Rainbow Dash grumbled to herself as she once again checked the time on her phone. It was 12:46 in the afternoon, well past when she and Applejack were supposed to meet up to visit Fluttershy. "I know AJ's getting huge, but she can't be that slow already, can she?"
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Having gotten tired of waiting for her friend to come by to her place, Rainbow decided to go on without her. However, while she was cutting through the forest, Applejack finally texted her back: "Hey Dash. Sorry I'm late. Wait for me. I'll catch up."
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That was 15 minutes ago.
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Being forced to wait even longer, Rainbow decided to quell her boredom a bit by leaning back against the most comfortable tree she could find and get some online shopping out of the way. She figured if Applejack’s going to be late, she might as well spend the time trying to find some cool new threads. At the very least, it was a nice and quiet day out.
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“Hey, Rainbow Dash!" A country voice suddenly called out from the distance. Rainbow looked up from her phone, expecting to find a bulked-up Applejack jogging down the path, looking as strong as ever despite her extra weight. But instead, it was an over-bloated Applejack speed-waddling her way over, looking as though she's trying to catch her breath. With her belly bouncing with every step of the way, it should be considered a miracle that her skin-tight t-shirt wasn't riding up. With her overweight appearance, as well as the comically-sized drink she was carrying, it's safe to say that AJ was truly letting herself go.
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Rainbow could only scoff as a sadistic grin began to form across her face, her mind racing to think of as many fat jokes as she can. "Jeez, AJ. You get stuck somewhere?"
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"Sorry I'm late," Applejack huffed as she slowed to a stop, trying to catch her breath. "I was havin' an early lunch when I realized I was runnin' late. So, I rushed out soon as I can. But then I saw this one burger place offerin' a buy-one-get-one deal on triple bacon cheeseburgers, and I had a hankerin' for a second lunch. So I went in for a quick bite, then I got a little distracted by their onion rings, their cheese taters, and their double-fried tenders. Oh, I got a little thirsty, too," she added and as gestured towards her root beer.
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"So did you you eat out the whole place while you were there, or were you just eating for you and your twins?" Rainbow laughed as she jokingly prodded a finger at AJ's bloated belly.
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"Oh, very funny." Applejack retorted sarcastically. "Y'all know I just can't help myself right now. I swear, it's like every time I see food, I feel like I just gotta have it."
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"Huh… So, I guess you wouldn't recommend the see-food diet?" Rainbow asked before immediately bursting into a laughing fit.
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"Alright…" Applejack sighed. Not being in the mood to argue, she just rolled her eyes and accepted what was coming. “Whatever else you gotta say, just spit it out now! Come on! Get it over with!”
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On the verge of tears, Rainbow quickly recollected herself. "Okay, one more. Then I'm done! I promise," she begged.
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The cowgirl said nothing in response. Just a stone-faced shrug of acknowledgement.
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Good enough for Rainbow, she continued on. "Look, I know losing to Rarity in a pie-eating contest was hard on you. But look on the bright side, at the rate you're going now, pretty soon the competition's gonna take one look at you and run the other way. Not cause they'll be scared of losing, but they'll be scared of being eaten." Capping off her lame string of jokes and insults, Rainbow practically left herself wheezing with joy.
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"You good?" Applejack asked with a stoic and unimpressed look on her face.
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"Yeah," Rainbow nodded, crying and nearly out of breath. “Yeah, I’m good for now.”

—

Applejack — 285 lbs
Rainbow — 120 lbs