The city skyline glittered beyond Marcus’s new apartment, a tenth-floor steal with a private rooftop terrace he hadn’t expected. He’d moved in a week ago, a quiet graphic designer fleeing a breakup, craving solitude. But solitude evaporated that first sleepless night when the humidity drove him outside, barefoot, onto the terrace. That’s when he saw them.

The penthouse next door was all glass and steel, its massive windows framing an open-concept living space. A couple—mid-thirties, gorgeous, magnetic—moved together on a sleek leather couch, oblivious to the world. She was tall, with dark curls spilling over her shoulders, straddling him in nothing but a satin slip hiked up to her hips. He was lean, shirtless, his hands gripping her thighs as she rocked against him, slow and deliberate. Marcus froze behind a row of potted ferns, the city’s hum fading to a dull roar in his ears.

Her head tipped back, lips parting in a silent moan as she ground harder, the slip sliding higher to reveal the curve of her ass. His fingers dug into her flesh, guiding her rhythm, then slid up to tug the satin down, exposing her breasts. He leaned forward, mouth closing over one nipple, sucking hard enough that her body arched, a shudder rippling through her. Marcus’s breath hitched, his shorts tightening as he watched them fuck with a raw, unhurried intensity—her nails raking his back, his thrusts lifting her off the couch. When she came, it was loud enough to carry faintly through the open air, a sharp cry that jolted him back to himself. He slipped inside, heart pounding, promising he wouldn’t look again.

But he did. The next night, they were at it again—this time against the window itself. She faced the glass, palms pressed to it, her reflection a hazy blur as he took her from behind. The angle showed everything: the flex of his hips, the way her breasts bounced with each thrust, the sweat gleaming on her skin. He yanked her hair back, exposing her throat, and she grinned, feral and unrestrained, as he pounded into her. Marcus crouched low, one hand braced on the terrace railing, the other slipping into his waistband before he could stop himself. He matched their pace, biting his lip to stay silent, arousal warring with guilt until they finished—her knees buckling, him pinning her to the glass as they both shuddered through it.

It became a ritual. Some nights were slow—her riding him on the floor, legs spread wide, teasing him with shallow rolls of her hips until he flipped her over, driving deep.

Then came the shift. One muggy evening, as thunder rumbled in the distance, they started on a chaise by the window. She knelt between his legs, taking him in her mouth, her head bobbing with a slow, torturous rhythm. His hands tangled in her hair, guiding her deeper, his jaw clenched in pleasure. But mid-act, he looked up—straight across the gap between buildings, straight at Marcus’s terrace. Their eyes locked. Marcus froze, half-hidden by a planter, but the man didn’t flinch. Instead, he smirked, a slow, wicked curve of his lips, and tightened his grip on her hair, pushing her down harder. She moaned around him, oblivious, and he kept staring, daring Marcus to watch.

The next night, the curtains were wider, the lights brighter. She rode him on the couch, facing the window this time, her eyes half-lidded but flicking toward the terrace as she moved. When she came, her gaze lingered, a ghost of a smile playing on her lips. Marcus stood openly now, no pretense, his hand working himself as she watched him watching her. The man noticed too, whispering something in her ear that made her laugh—a low, throaty sound—before he flipped her onto her back, spreading her legs wide and fucking her with a ferocity that felt performative, aimed at him.

The game peaked two nights later. A storm had cleared the air, and Marcus stepped onto the terrace to find a note taped to the railing, scrawled in sharp ink: “Come closer next time.” Below, they waited—her in a sheer robe, him in nothing, already hard. She straddled him on the window ledge, facing out, her robe falling open as she sank onto him. He gripped her hips, lifting her up and down, but both their eyes were on Marcus. She beckoned with a finger, lips parted, and he stepped forward, trembling, until he stood at the terrace’s edge, inches from the drop. She fucked him harder, her moans louder, staged, and when she came, she mouthed something—“You’re next”—before collapsing against her partner, both of them grinning up at him.

Marcus didn’t sleep that night. The terrace called, but so did the question: watch, or cross the line? The note burned a hole in his pocket, and the city lights flickered like a dare.