Applejack with a musclegut/chubuff figure? Like she'd gained a big potbelly, but no matter how much she worked out, she built muscle but did not lose any fat, and in fact her always-rumbling-gut kept growing along with her workouts due to not cutting down on eating? Anyway, the actual time the story's at, is when she's starting to enjoy this sort of figure, and indulge further on her eating~?

Applejack leaned back in her seat and groaned. Her chair creaked beneath her weight. She grinned at that; she’d always heard that muscle was heavier than fat, but it looked like when a pony put the two of them together…

She massaged her gut. Her arm was all rippling muscle, her bicep alone bulging almost as large as her head, but her stomach was a big, soft ball of chub. More than chub, really - anypony who would’ve dared might have even suggested that Applejack was verging on fat.

Applebucking hips were one thing. A forty-five-inch waistline was another thing entirely, especially when it seemed to be growing by the week.

AJ took another few moments just to let her hands roam over the rest of her body. She was probably the strongest mare in Ponyville by now, and the muscles swelling from her arms and legs definitely had the size to prove it. She grinned, flexing and savoring the feeling of strength in her arm. At the same time, though, her flexing bicep pushed into the bottom of her bust, forcing it forward.

She’d long since lost count of what cup size she was. She’d passed an F-cup…what, a month ago? And since then, she’d just kept eating and working out, her muscled chest pushing her bouncing boobs out even as they grew larger and plusher on their own. She gave her fat nipples a squeeze, and moaned softly as they throbbed with pleasure in response.

Her hands curved back down across her bust and down to her stomach. By now, it was gurgling and groaning. Applejack grinned to herself. It took a lot of calories to keep up this much muscle. Who cared if a little bit went to her hips? It was an Apple family tradition to over, rather than underfeed its members, and her rotund, yet sculpted figure was bountiful enough to be the proof.

If prodded, she’d even swear that she even felt taller than she’d been a few months ago. AJ had never been a short stallion, topping out at six feet even (which was no surprise; Mac was more than halfway from there to seven feet), but she’d started finding the tops of doorways a little bit closer, her clothes a little restrictive in more than just width.

She gave her belly a heavy pat, and it gurgled in response. She chuckled. Looked like it was time for another feeding. She’d eaten three meals so far today - a family-sized breakfast, a midmorning “snack,” and lunch - but surely a second lunch couldn’t hurt. “Gotta keep this body fed,” she murmured, squeezing her right bicep with her other hand. Her grin widened. “Can’t keep that belly hungry.”

Luckily, it looked like Granny had left out the remnants of the rest of the family’s lunch on the table. While Applejack had gotten into the habit of eating almost as much as the rest of them combined - which was no surprise, really; by now she was sure she could lift near twice weight as much as even Big Mac could - their leavings would be enough to stave off her hunger, for a little while at least.

So she ate - and ate, and ate, and ate, gorging herself on leftover sandwiches, soup, and fruit. She finished it all off with one of the big apple pies Granny had cooked that morning, and washed that down with four big mugs of cider.

By the end of it, her belly was big, wobbly, and gurgling louder than ever - though, thankfully, no longer from hunger. Applejack just patted it, rubbed it lightly, and stood up. Her gut flopped over her waistband, even as her thick, corded thighs strained against her jeans. She might have to look into getting new pants sometime soon. This would be the second pair this month she’d outgrown.

But not today. There was still work to be done. So, with a grunt and a smile, Applejack strolled out of the kitchen, her oversized bust jiggling and bouncing atop her gut with every step.