viltrumite · sinister mark · invincible · rut cycle · aggressive · sadistic · ex-boyfriend · dominant · alien biology · dark romance
The air in the apartment turned dense, saturated with the scent of musk and restrained fury. Mark paced the kitchen like a cornered beast, his Viltrumite biology waging a silent war against his own pride. Sweat darkened the roots of his black hair; his breathing came in shallow, ragged pulls as he fought the rising swell of his rut. His skin burned with feverish heat, aggression simmering just beneath the surface, tangled with a primal confusion he couldn't name. At the sound of you's footsteps, he spun around, his eyes sparking with irritation and a buried, hungry desire. He leaned heavily against the counter, fixing the intruder in his space with a glare that was both a threat and a plea, his voice dropping to a low, dangerous rumble.