Chapter 5: Precision Nutrition
Jim’s body still hummed with the phantom echoes of Beth’s grip, her rhythm, her command. Sleep had been a fractured thing, his sheets tangling with memories of red light and sweat-slick skin. When her message buzzed on his phone—Lab 3B. 0700. Don’t be late.—a fresh current of anticipation shot through him, tight and electric.
The Nutrition Lab was a temple of cold efficiency. Stainless steel surfaces reflected the harsh fluorescent lights. The air was thick with the chalky sweetness of mass-gainer powder and the sharper, chemical tang of compounds he couldn’t name. Blenders whirred like industrial engines. Beth was already there, leaning against a counter, her arms folded over a tight grey tank top. She looked different in this light—less a goddess of the gym, more a technician.
“You look like shit,” she said, her voice cutting through the mechanical noise. “Good. Means you burned calories.” A smirk played on her lips. “Recovery is part of the process. For us, it’s about surplus. For you?” She pushed off the counter. “It’s about precision.”
She led him to a prep station. Laid out were a stainless steel blender pitcher, a digital scale, a set of measuring spoons, and an array of containers: a bucket of chalky protein, a jar of oily peanut butter, a carton of brown eggs, and two smaller, locked canisters labeled X-7 Hyper-Anabolic Matrix and Tissue Volumizing Catalyst.
“This,” Beth said, tapping the blender, “is as important as any barbell. Maybe more. The body is built in the kitchen. Or, in our case, the lab.” She opened the fridge and pulled out a jug of whole milk, thick with cream at the top. “My shake. You make it. Exactly to spec.”
She handed him a worn notecard. The instructions were in her aggressive script.
2 scoops Isolate Pro-100 (blue scoop)
1 heaping tbsp all-natural peanut butter
3 raw, whole eggs
12 oz whole milk
2.5 ml X-7 (USE DROPPER)
1 level scoop Volumizing Catalyst (RED SCOOP – DO NOT HEAP)
“Read it back to me,” she ordered.
He did, his voice sounding thin against the lab’s hum.
“Good. Now execute. No spills. No errors. The catalysts are dosage-sensitive. Too little does nothing. Too much…” She let the implication hang. “It’s not pleasant.”
His hands were steady, a surprise. He measured the protein powder, the chalky dust scenting the air. He scooped the peanut butter, its dense fat clinging to the spoon. He cracked the eggs one-handed, the yolks falling whole into the mixture like setting suns. Beth watched, her gaze a physical weight on his fingers.
The catalysts were next. The X-7 was in a small amber bottle. He used the dropper, counting the drops as they fell, each one a viscous, dark amber bead. The Volumizing Catalyst was a fine pink powder. He leveled it off with a knife, just as she’d instructed.
“Now blend,” she said. “Until it’s smooth. No chunks.”
He secured the lid and hit the switch. The machine roared to life, vortexing the ingredients into a thick, frothy beige concoction. He poured it into a large shaker cup and handed it to her.
She took it, her fingers brushing his. She didn’t drink immediately. Instead, she studied him, then the shake. She brought it to her lips and took a long, deep pull. Her throat worked as she swallowed. A drop clung to her lower lip, and she caught it with her tongue.
“Taste,” she said, holding the cup out to him.
He took a sip. It was overwhelmingly rich, cloyingly sweet, with an underlying chemical bitterness that coated his tongue.
“That bitterness?” she said, taking the cup back. “That’s growth. It tastes like potential.” She drank more, deeper this time, a greedy consumption. As she drank, she reached behind her back with her free hand. There was a quick, practiced motion, and the clasp of her bra sprung open. She shrugged one strap off her shoulder, then the other, pulling the garment out through the sleeve of her tank top. She tossed the bra onto the counter.
It was a substantial sports bra, but the central panel was visibly strained, the fabric stretched thin.
“Fucking thing is strangling me by noon every day,” she grumbled, but there was pride in it. She took another long drink, then set the cup down. “They’re tender as hell today. The Catalyst. It floods the tissues. Makes everything… swollen.” Her eyes locked on his. “Handle them.”
It wasn’t a question. He stepped closer. His hands, which had been so precise with measurements, felt clumsy as he reached out. He lifted the hem of her tank top. She didn’t help him, just watched, her breathing slowing. He pulled the fabric up, over the full curve of her stomach, her ribcage, and finally, revealing her breasts.
They were heavy, rounded masses, the skin taut and shining. The veins beneath were more pronounced than he remembered, a delicate blue map of heightened circulation. Her nipples were hard, pebbled, and a deep, flushed pink. The scent of her, warm skin and faint sweat, cut through the lab’s chemical air.
He cupped the undersides first, taking their weight. They were warm, almost feverish. She hissed in a breath. “Gently.”
He explored the new fullness, tracing the soft, stretched skin. He thumbed her nipples, and she flinched, a jolt going through her.
“Sensitive,” she whispered, her eyes closing. “Everything’s so… plugged in.”
He leaned down and took one peaked nipple into his mouth. He swirled his tongue around the stiffened flesh, and she groaned, her hand coming up to the back of his head, fingers tangling in his hair. The taste was clean salt and skin. He suckled softly, and she arched into him, a soft, desperate sound escaping her lips.
“The other one,” she breathed. “Don’t neglect it.”
He switched, giving the same attention to her other breast. Her grip on his hair tightened, guiding him. This was different from the gym. There was no frantic race to climax. This was a slow, worshipful inspection, a visceral acknowledgment of her transformation. His own arousal was a dull, persistent ache, but it was secondary to her response, to the way her body trembled under his ministrations.
“They feel heavy, don’t they?” she murmured, her voice dreamy. “Full. It’s like they’re humming. The stuff you mixed is in my bloodstream now. It’s in here.” She pushed his head deeper into her chest. “You can taste it.”
He could. A metallic hint beneath her skin.
She pushed him back suddenly, her eyes flashing open, dark and hungry. “Enough foreplay.” She turned around, bracing her hands on the steel counter, her back to him. She looked over her shoulder. “You fed me. Now I need to burn it off. Help me.”
She pushed her leggings and underwear down to her knees. The powerful swell of her ass was unveiled, the muscles defined even in repose. She was already wet; he could see the slick shine between her thighs.
He fumbled with his own pants, freeing his cock. He stepped up behind her, aligning himself. He pushed into her in one slow, continuous stroke. She was so tight, so hot, still gripping him from the inside with that same intense, muscular clench. She let out a long, low groan as he bottomed out.
“Fuck, yes,” she grunted, pushing back against him. “That’s the spot. Right there. It’s like the pump after a heavy set. Everything’s engorged. Can you feel it?”
He could. The internal pulsing was rhythmic, intense. He gripped her hips, his fingers digging into the firm flesh, and began to move. He set a deep, driving pace, each thrust met with a forceful push back from her. The noise was obscene in the sterile room—the wet slap of their bodies, the clatter of a measuring spoon knocked to the floor, her ragged pants.
“Harder,” she demanded, her voice rough. “I’m not made of glass. I’m made of fucking muscle and synthetic hormone. Use it. Use me.”
He obeyed, slamming into her with a force that made the counter rattle. She threw her head back, a string of curses and praise falling from her lips. “Yeah! That’s it! That metabolizes the shake! Fuck it right through me!”
Her internal muscles began to flutter, then clamp down in a series of violent spasms. Her climax wasn’t a quiet surrender; it was a conquest. She screamed, a raw, unfiltered sound that echoed off the steel surfaces, her whole body locking into a rigid, quivering arc. The contractions milked him, pulled him deeper, and his own control shattered. He came with a broken gasp, emptying himself into her, his vision swimming with the sight of her powerful back, the sheen of sweat on her skin.
They stayed like that for a moment, connected, panting, the blenders still whirring around them. Slowly, she straightened, and he slipped out of her. She turned, pulling her clothes up with a practical efficiency, though her hands trembled slightly. She looked at him, her face flushed, her eyes clear and focused.
“That’s post-workout nutrition,” she said, her voice hoarse but firm. She picked up her half-finished shake and finished it in three long gulps. She wiped her mouth with the back of her hand. “The body is a machine, Jim. Input. Output. You just facilitated a major metabolic process.” A tired, genuine smile touched her lips. “You’re learning.”
She gathered her strained bra from the counter, looked at it, and chuckled. “Gonna need a new one by Friday.” She started for the door, then paused. “Clean the station. Sterilize everything. Precision, remember?”
Then she was gone, leaving him alone with the humming machines, the lingering scents of sex and protein, and the profound, unsettling sense that he was no longer just a student, or a spotter, or even a lover.
He was becoming part of the feedstock.