The old house creaked under the weight of the storm, but the real thunder lived in the locked bedroom where Mark had dragged his younger sister, Lena. She was twenty-two, old enough to know better than to test him after their parents left for the weekend. He had waited years for this moment, the power finally shifting in his favor. Lena fought at first, her fists pounding against his chest, but Mark pinned her wrists above her head with one hand, his body pressing her into the mattress.
"You've teased me long enough," he growled, his voice low and unyielding. "Tonight you learn who owns this family." He ripped her thin nightshirt open, exposing her breasts to the cool air. Lena gasped, a mix of fear and unwanted heat flooding her cheeks. Mark didn't hesitate. He lowered his mouth, sucking hard on one nipple while his free hand shoved between her thighs, forcing them apart.
Her panties were already damp, betraying her even as she bucked against him.
"Stop, Mark, this is wrong," she pleaded, but her voice cracked with something deeper. He ignored the words, hooking his fingers into her underwear and yanking them down. His cock strained against his jeans, thick and insistent. He freed it, the heavy length slapping against her bare stomach as he positioned himself. Lena's eyes widened at the sight. Mark thrust forward without mercy, burying himself to the hilt in one brutal stroke. She cried out, her walls clenching tight around his invasion, but he held her down, hips snapping with relentless force.
Each thrust was a declaration of dominance. He fucked her like he owned her, like the blood they shared gave him every right. Lena's struggles weakened as pleasure twisted through the pain, her hips rising involuntarily to meet him. Mark leaned in, biting her neck hard enough to mark. "Take it," he commanded. "You're mine now, little sister. This cunt belongs to the family." His balls slapped against her ass with every drive, the wet sounds filling the room alongside her ragged moans.
He flipped her onto her stomach, yanking her hips up. From behind, he drove deeper, one hand fisting her hair while the other reached around to rub her swollen clit in harsh circles. Lena sobbed into the pillow, her body betraying her with a sudden, shattering orgasm that milked his cock. Mark didn't stop. He pounded through her climax, building his own, grunting as he filled her with hot pulses of cum. Even then he stayed buried, letting it drip out around his shaft before starting again, slower but no less intense, forcing her to feel every inch as he reclaimed her.
Hours later, when the storm passed, Lena lay exhausted and marked, her body humming with the dark satisfaction of submission. Mark pulled her close, his voice a dark promise against her ear. "This is only the beginning. The family stays together, no matter what." She didn't argue. In the silence, the power exchange settled like a new law between them, binding and unbreakable.
