Zim's entire being burned with desire, and it was like nothing he had ever felt before. It was all-consuming, preventing his normal thought processes and actions from happening as they usually would. He couldn't think about anything else but the lust that enveloped his thoughts and his skin. It was hot, almost enough to burn, but just enough to make his pulse race for relief. Though he knew deep down that he didn't want to do this, didn't want to let the human see him this way, he couldn't help but enjoy the ministrations of his thicker fingers.
Dib's touch was intoxicating, opening new feelings to Zim's previously routine life. His larger and more numerous fingers worked heat across Zim's body, but the majority of it concentrated in his spooch deep within. There was nothing Zim wanted more than to relieve the heat, which was burning him from the inside out. He didn't consciously know how to fix it, but the slick that poured from his intimates and his length begged to differ. The instinct inside commanded Zim to mate, and while Zim didn't want to go through with it, he knew somewhere in the back of the mind that he needed it.
The human grew closer to Zim's naked form, his eyes, blown wide with lust, watching his pale face blush blue with shame and excitement.
The only thing Zim could feel was his length, thick and hot, straining against Dib's cargoes pressed against his thigh. His lips were hot, pressing closer and nipping bruises into the tender flesh. The heat inside was intoxicating, focusing Zim's attention on his touch and growing slick against the silky sheets. Dib's hands were firm but gentle, touching his hips and sliding up and down his waist. They touched Zim's form gently at first, growing firmer with his positive responses.
The tension was high in the small space they shared. The only thing audible was the breathing of the other. Dib's hand was gripped tight around Zim's thigh, squeezing harder when he reached over or lifted his eyes to meet his. His hand slid over the smooth flesh over and over, working more heat into Zim's most intimate areas and making him whimper with need. Slowly, he inched closer and closer to Zim, taking secretive pride in the way he cried out and spread his legs for Dib desperately. Zim couldn't help but reach over too, feeling Dib's length strain through the fabric of his cargoes. It was painfully hard, engorged with lust and throbbing with the rhythm of his pulse.
He bit his lip and squeezed Zim tighter with every touch, subtly arching his hips into Zim's slender fingertips. He pulls Zim's face roughly against his, gripping his jaw with one hand to coax it to take his tongue. His hands clutched the sides of Zim's face while he pushes his lips against Dib's, uncaring of the mess it would make of both of them. He growls lustfully into the kiss, nipping at Zim's lips while he balls his hands into fists in Dib's shirt, tearing holes in it. Dib breaks the kiss, panting with heat, and his hands are squeezing tighter now, sure to bruise Zim's pliant thighs for the next few days.
Zim cries out quietly, feeling Dib's fingers finally force their way into his soft folds, rubbing outside his slicked hole. Dib growls again, feeling the slick build up on his fingertips. He looks at Zim's pale skin and at him for a few moments, the heat and lust in their gaze overpowering common sense and restraint.
Dib can't find a reason to hesitate. His fingers spread Zim open teasingly and his lips are parted with excitement gazing at the unfamiliar sight. Dib grips the small alien's hands and pushes him into the pillowy sheets. The door shut loudly, whether sensing a private moment or broken, Dib didn't know, though he wasn't worried about it in the moment.
He's already unbuckling his belt, undoing the buckle and pulling it through the loops. He leans into Zim for a searing kiss, the heat of their desires painfully clear in it. His tongue forces its way into Zim's mouth, and he kisses back just as eagerly, if not more. He grips the human's biceps tightly, silently begging for relief of this heat they've found themselves in. Their tongues dance around each other, reveling in the flavor of the other, despite the slight stinging sensation. Zim's hands are in Dib's thick hair, gripping tightly but not painfully, pulling him ever closer. He breaks the kiss to look Dib in the eye, and heat lingers between them in those few short seconds.
Dib directs his attention to Zim's blanketed form, sticky with slick and incredibly warm. Dib realizes that this was what he found upstairs on Zim's tattered pants, though it seems more erotic than important at the moment. He doesn't waste time in sliding the blanket off of Zim's form, his length catching on the soaked fabric and elicting a cry from his lips. Dib pushes his fingers into Zim's small mouth, letting pride fill him at the look of need on the alien's face. He touches the foreign length lightly, reveling in the moan that escapes from Zim's mouth.
One of his hands is tangled in Dib's hair again, holding it away from his face and inviting him to do what he'd like. The look on Zim's face is priceless, Dib would have thought prior to now, vulnerable and desperate. Dib pushes Zim farther into the pillows, suggesting he stay in his current position. Dib's instinct, due to equal parts his own arousal and Zim's pheromones, demands he take what is being presented to him. He wants to show this being pleasure, by any means necessary.
Zim's legs trembled with the painful but so, so pleasurable angle, feeling Dib's hands work bruises into his pliant thighs. He whimpered sweet moans into the fabric of the mattress, feeling the human's length line up with his slick and needy hole. His hands pushed Zim farther into the sheets, arching his back further and muffling his cries. Zim hears him growl lowly in his ear, Dib's length throbbing against the lips of Zim's candy center while his hot breath envelops his senses. Out of sheer instinct, Zim's hips sway against his length, enticing him further in his overwhelmed state with the promising slick of Zim's intimates.
Zim blushes blue again, ashamed at the action he just took, but at the same time growing wetter from the feeling of Dib's hot length pressing against him. He squeezes the flesh again and the grip on Zim's thighs grows tighter by the second. His strong hands pry the small alien's thighs apart and he hears him growl at the sight of the slick coating his mate. His hot palms slide up Zim's slender hips to his shoulders, gripping them tight and pulling Zim closer to himself. Zim feels his desire overcome him further, demanding he be a willing mate and take what is being offered.
He can't take it anymore, he needs it, wants it, will die if he doesn't get it right now. He cries out in need and frustration, needing so badly what was teasing him right then and there. Dib obliged him, thankfully.
He sheathes himself inside Zim, the thick length almost knotting Zim's drenched hole and stretching it further. Dib hisses through his teeth, giving Zim's hips a firm squeeze. He trembles beneath the human's form, overwhelemed with the pleasure that was much stronger than he expected, whimpering louder into the sheets and squeezing tightly around his length.
Dib's weight is on him in an instant, arching his back both too far and not far enough. He leans his hands onto Zim's shoulders, preventing any means of escape, though he wasn't inclined to try. His hips push farther into Zim's, desperately filling him up with his length as far as he could take. His legs tremble with the angle, his moans muffled in the cushions. Zim felt his mate's hand deliver a slap to his backside and hears him growl from the rapidly blooming dark green handprint on it.
Zim wiggles away from the onslaught of force, trying to ease the pace on his hips, only to be pulled back even rougher this time. Zim almost laughs from the impossibility of escaping his position, but he is cut off by the feeling of Dib's thrusts becoming deeper and deeper. Zim listens to his mate cry out his name less than quietly, and the next thing Zim feels is his length burying itself inside him to the hilt.
He collapses against the edge of the mattress, crying out his name in ecstasy and for a moment not caring about his volume. Zim feels his length press deep and shoot seed deep into his spooch, twitching against his walls. He whimpers, used and satisfied, feeling his seed fill him up past his limit. Dib's length pulls from Zim's candy center, bringing seed with it and letting it drip to the sheets below them.
Zim, exhausted from the rough pace endured, tried not to think about the action he committed against his people. It was taboo to do such a thing with another to species, to dilute the pure Irken bloodline.
But again, it felt so good and Zim felt such relief from taking Dib's length over and over. And, surely their DNA wouldn't be compatible. Right? They were much too different, after all; a smeet born from such a union would most definitely be unviable in the short term, let alone the long-term. Hopefully so, Zim thought to himself, as he sensed his PAK force him to sleep.