“Jesus, Theresa!” Theresa’s colleague Susan said, looking at her left bicep pose, “You're getting bigger every day!”

“I know, Susan! Look at this peak!”

She flexed harder and her bicep rose higher. She happily tapped it with a finger.

“You’re absolutely amazing, Theresa,” her colleague Rachel added. “I could never find the willpower to develop a body like yours.”

Another colleague, Michelle, reached out and tried to squeeze it. Theresa smiled. “Look at you! If you get any bigger, girl, you're gonna pop!”

Theresa crab posed her front striated and vascular for them all to see it. “Does that look like such a bad thing, girls?” she smiled. “You should all try gaining some muscle. It feels incredible.”

She looked around at all of them, all women, some skinny, some fat, others in between. Every day Theresa would come to work, her muscles stretching her blouse and skirt, and every day during lunch they would all beg her to give them a show in the bathroom, where the mirror was the biggest, and they would praise her for her developed physique. They all saw Theresa as the universal symbol of the strong woman around the office, bigger than the boys. Theresa absolutely adored the praise. She never tired of them paging her cubicle for quick flexes of this body part, or showing them that body part, or them asking her to help lift something heavy, or push something that wouldn't budge, or pull something stubborn, or open something stuck, from doors to jars. Theresa would smile proudly and slip out of her pumps and go off on her "missions," loving how the bigger she became the lighter everything else became.

She began to squeeze back into her bra.

“Man, Theresa, you’re incredible,” a woman said, thudding down Teresa's indomitable abdominals.

Theresa blushed.

“So when do you plan on coming to the party tonight?” another asked.

She looked up from buttoning her blouse. “I plan to be there about seven, girls,” she smiled, “Me and my amazing muscles.”

After work, Theresa rushed inside her house and quickly locked the door. She leaned her thick back and broad shoulders against the door and looked down at her Beluga Tonneau. “Just made it,” she said.

Suddenly, her suit jacket began to sink and sag on her, the crisp pinstripes folding to wrinkles. Her jacket's sleeves overtook her hands and then her painted fingertips, and something seemed to melt her broad, round shoulders until they were small and soft. Her chest too sunk into her body and her suit, no longer held taut by her bold breasts, lowered to reveal a red lace bra emptying of shrinking orbs. Finally, her skirt dropped to a ring around her feet, abandoning the red lace thong she had been wearing underneath, and a clock chimed six o’clock.

Theresa took off the remains of her suit and underwear, and walked her now thin, naked body down to the basement.

“Maaatt..." she called, smiling, as her thin nude body descended the basement stairs, "Where are yooou..."

She flicked on the lights.

“There you are!” she joked, looking at her husband chained to the basement wall. “You and that wonderful cum of yours.” She had him positioned so that his member was about mouth-level. “I don’t know about you, honey, but I’m parched.”

Theresa licked up the length of his shaft and sucked off his head with a wet smack. “Absolutely parched.”

She began stroking him in firm, satisfying strokes. “Good news, darling. Everyone at the office absolutely loves all my latest gains.” She chuckled. “Why just yesterday I looked at my blouse and realized I had lost a button! And wouldn’t you know it? I didn’t even see where it went or when it happened, somewhere between the eight flights of stairs I lugged the copy machine up I guess.”

“What?” She laughed, “Don’t look at me like that. You wanted me to force the darn thing through the elevator? I mean I could’ve--I really could've--but then what kind of muscle story would I have for my sweetheart when I got home?”

Her husband was throbbing hard in her fingers now.

“There’s my husband. Just imagine me big and muscular again, just like you like me—and just like I’m going to be again in a little while.” She quickened her pace.

“I was invited to an office party tonight, sweetheart. Everyone is waiting right now for my big, strong, bulging muscles to show, and I wouldn’t want to disappoint them, now would I? I think I’ll start with some handstand pushups tonight. They’re so easy. What do you think, sweetheart? Won’t I be a sight to see?”

He began to twitch in her fingers.

She turned, tapping a finger on her lips, and increased her speed on her husband a little.

“Hmm, and what else?” she asked, “What can you do when you’re a woman who's big and muscular? Maybe I’ll show off by lifting something really heavy, like a dinner table or one of the guys from work! or two of them! What do you think, Matty? You think I'll be able to lift three of them at the same time when I'm big again? Yeah, me too. And wouldn't you like to watch me, Matt? As I lift them up like dolls? If I'm wearing a jacket you'll bet your bottom dollar I'll have to take it off, because my muscles will be rippling. I really hope I don’t rip right out of my dress…”

It was time. She wrapped her warm, soft lips around Matt’s head and drank down the cum that poured into her mouth, milking him with her hand and sucking down every last drop. She wiped her lips with her fingers and sucked the tips. “Mmmmm... That was a lot of juice, sweetheart. I don’t think you’ve ever given me that much before, not even the first night when I found out about you.”

Theresa looked down at her hands and she wondered how much more muscle she would gain this time. She wetted her finger and fed Matt some cum. The muscles on his body puffed out with the beginnings of definition and she smiled.

“I’ll just tell them that I just finished a workout or something,” she shrugged, then began to hold her stomach as it twisted with pain, just like it always did.

She heard the sound of her muscles growing on her again, the sounds of her hair lengthening. It was gaining a beautiful luster and sheen. She felt energized again, felt as if she could run miles, felt strength coursing through her body, as if she could stop a full city bus and lift it off its wheels. She saw veins rise on her forearms and the back of her hands. The expanding muscle of her arms pushed away the expanding muscle of her chests and lats. She gained abdominals and then size and then definition before her breasts grew and rounded her out.

Theresa pushed back the pain mentally with thoughts about the party, thinking about what she would do, to whom, what she would wear, and hearing in her mind all her colleagues' soon-to-be praises. In her mind she could see them all waiting for her now, waiting for the reveal of her big, buff body, and she knew she was going to have a great time being strong.