Green vs black

The subterranean laboratory was quieter than usual, the great boilers banked to a low thrum and the only light a single green-shaded lamp above the workbench. Doctor Bruce Banner hunched over a beaker of shimmering emerald serum, his spectacles fogged from the steam. He had sent the others away—Stark to his iron suit, Rogers to patrol the fog-choked streets—claiming he needed solitude to tame the “Titan” compound. In truth, he needed distance from the beast that stirred inside him whenever the pressure rose.

A soft click of the hidden door. He didn’t look up at first; only the faint scent of gun-oil and winter roses told him who had entered.

“Still playing with fire, Doctor?” Natalia Romanova’s voice was velvet over steel. She stepped into the circle of lamplight, black velvet coat unbuttoned to reveal a charcoal corset laced tight, the swell of her breasts rising with each measured breath. Her red hair was pinned in a severe knot, a few rebellious strands curling against the pale column of her throat. A holster rode low on her hip; the pearl-handled pistol glinted like a promise.

Banner’s hand trembled; the beaker clinked against the table. “I told Stark no visitors.”

“Stark isn’t here.” She prowled closer, boots silent on the flagstones. “And I’m not a visitor. I’m the consequence of your mistake.” She lifted the beaker from his fingers, sniffed the serum, then set it aside with deliberate care. “You created the Titan. Now let me help you leash it.”

He finally met her eyes—green glass reflecting green fire—and felt the familiar surge beneath his ribs. Not rage. Something far more dangerous. “You don’t know what you’re asking.”

Natalia’s smile was slow, lethal. “I know exactly what I’m asking.” She unbuckled the holster, let it fall, then reached for the laces of her corset. One tug, and the garment loosened; another, and it slid from her shoulders, baring flawless skin, the faint white scar that curved beneath her left breast like a secret signature. She wore nothing beneath but sheer black stockings and a garter of crimson silk.

Banner’s breath hitched. The beast inside growled approval.

She closed the distance, palms sliding up his chest, pushing his waistcoat aside. “I’ve watched you fight it every night,” she murmured against his ear. “The way your pulse races, the way your hands shake. Let me take the pressure off, Doctor. Let me be the valve.”

His restraint snapped like a frayed cable. He seized her waist, lifted her onto the workbench, scattering vials in a crystalline crash. Her legs parted instantly, stockings rasping against his trousers as she hooked her heels behind his thighs. Banner’s mouth found the scar, tongue tracing its path to the stiff peak of her nipple. He sucked hard; she arched with a hiss, fingers spearing into his hair.

Natalia’s hands were everywhere—unbuttoning, unzipping, freeing the thick length of him from confinement. He was already slick at the tip; she stroked once, twice, guiding him to her entrance. “No more science tonight,” she whispered. “Just this.”

He thrust in to the hilt. She was scalding, impossibly tight, inner muscles fluttering around him as if welcoming the intrusion. The workbench groaned beneath them; glass shards glittered like frost on the floor. Banner set a brutal pace—hips snapping, breath ragged—each stroke driving deeper, chasing the roar in his blood. Natalia met him thrust for thrust, nails raking down his back, urging him harder, faster.

She came first, a sharp cry muffled against his shoulder, walls clenching in rhythmic pulses that dragged him over the edge. He spilled inside her with a guttural sound, hips jerking through the aftershocks.

But the beast was only sated, not silenced.

Natalia slid from the bench, turned, and bent over it—offering. The sight of her, slick thighs trembling, arousal glistening on swollen folds, nearly undid him again. He entered her from behind in one slick glide, hands gripping her hips hard enough to bruise. This time was slower, deliberate—long, grinding strokes that rubbed her clit against the bench’s edge. She reached back, fingers digging into his thigh, begging in Russian, in English, in broken gasps.

When she shattered a second time, he pulled out, spun her, and dropped to his knees. His tongue plunged into her, lapping their mingled release, circling her clit until her legs buckled. She came against his mouth with a sob, thighs clamping his head, flooding him with the taste of salt and sex.

Hours blurred. They moved through the lab like a fever dream—against the cold iron wall where her back arched and his name tore from her throat; atop the velvet chaise where she rode him reverse, red hair spilling down her spine like molten copper; on the floor amid scattered notes, her ankles locked at the small of his back as he drove into her with single-minded focus.

Near dawn, they lay tangled on a pile of discarded lab coats, her head on his chest, his fingers tracing lazy circles over the curve of her hip. The serum beaker sat untouched on the shelf, its glow dimmed.

“You didn’t change,” she murmured, lips brushing the sweat-damp skin over his heart.

Banner exhaled, the beast a low, contented rumble rather than a roar. “You gave it something else to devour.”

Natalia smiled, wicked and soft all at once. “Then we’ll keep feeding it, Doctor. Every night, until the Titan learns who truly holds the leash.”

Outside, the fog began to lift, revealing the first pale streaks of morning. Inside, the laboratory smelled of sex, serum, and the faint metallic promise of experiments yet to come.