Human Babs has been taking bull steroids to get big at the gym. Unfortunately, side effects include additional chub, a thicker ass, a cow tail and huge milky tits.

Babs paused mid-squat as the sound of stifled giggling reached her ears. She glanced around the room, the eighty-pound weights sitting perfectly still in her hands. She kept her arms flexed; ever since she’d started getting Big (she always made sure to pronounce the capital B), she’d loved the feeling of her muscle tensing, flexing up against itself. It reminded her of how huge she was getting.

The source of the giggles was easy enough to find. Two slender mares - Rose and Lily-something, Babs thought - were eyeing her from beside a pair of trendmills. This was Babs’ first time at the Ponyville Gym. She was only visiting for the Apple Family Reunion, but she figured that a lifter who skipped Leg Day was worse than the lowest of the low, and had decided to hit the gym regardless.

Funnily enough, the giggling didn’t bother her. Instead, Babs found her mouth curling upward into a smirk. She’d gotten Big to get attention, and she’d be damned if she’d ignore it. So, after setting the weights aside with a grunt, she stood up, placed her hands on her generous hips, and began to walk over.

The pills she’d taken to get Big weren’t, admittedly, all she’d expected. They’d done all that she’d dreamed of and more, but they’d brought some surprises as well. Still, Babs had to admit that she found her bouncing, chubby gut at least as much of a turn-on as her massive, jiggling ass. She made sure to sway her hips as much as she could as she walked over, just to make sure to give each of her parts that little extra bounce.

Bounce they did. Babs found her smile widening as the two mares caught her eye and paled. Their attention rapidly turned to the two enormous breasts gently slapping across her chest. Babs’ grin went from ear to ear, now, and the two mares were blushing redder than Red Delicious.

Each one of those knockers looked like it could have held enough milk to feed a small orphanage. Aside from her thick, bulging muscles and height, Babs had to admit that there were few things she enjoyed about her new body more than her bust. It filled most of the lower third of her vision, her giant, rounded tits bouncing and swaying with every step she took. She was tall and big enough that most ponies could barely see her face from underneath those massive mammaries. As she stepped up to the two much smaller mares, it became pretty obvious that they weren’t going to have the easiest time of doing that.

“Hey,” Babs said casually. She stopped just a foot or so away from the first mare, and placed her hands on her hips again. She could’ve started mashing her fingers into her clit right then and there from the pure sensuality of feeling that squishy flesh above her tight, steely thighs. Either one of her biceps could have easily matched the size of the smaller mare’s head, and her legs just put the entirety of “Rose’s” body to shame.

Never skip Leg Day. Ever.

“You girls enjoying the view?” Babs asked. She shifted her weight from leg to leg, savoring the way the other mares’ eyes nearly popped out of their skulls as her enormous tits began to drip with milk. That had been one of the other effects of the pills, though she’d been quick to see it as a benefit. Most stallions and mares she’d been with seemed to more than appreciate a little extra milk in their diet. She didn’t see why these two would be any different.

“Ulp.” Rose exchanged a look with the other mare - Daisy! Babs remembered, mentally snapping her fingers - and swallowed. “Uh. Hi?”

Not giggling anymore, huh? “Just saw you guys working out and thought I’d see how you were doing.” Babs drew herself up to her full height, just letting the girls appreciate how her assets bounced and swayed. “I’ve had a long workout, but it’s always good to check in with other gym patrons. Hard work, right?” She smacked her own ass for emphasis.

Daisy stared at Babs’ enormous, jiggling ass. It wasn’t long before her eyes followed the point of contact up to Babs’ thick, muscled forearms, and even further up to her bulging biceps and even thicker neck. Then, she met Babs’ vivid, green eyes and began to sweat.

Babs reached around her chubby waist with her cow’s tail - another “gift” of the pills” - and gently tickled Daisy under the chin. Out here in the gym, it was the job of a barely adequate sports bra and a pair of overstuffed gym shorts to contain her enormous, magnificent, growing body. But in the lockers…

Well. Anything could happen.

Babs knelt down until her damp nipples were just barely brushing against Daisy’s own. She leaned in real close and met Daisy’s quivering eyes.

“Care to take a break?” she asked softly.