Everything would have been fine if he could have kept his distance.  Donatello could have managed if they didn’t drag him so damn close to her.  Maintaining composure was impossible in this proximity.  As he continued tonguing at her sex, her pheromones further inebriated him.  That dazed paralysis gradually passed.  Though still weakened from his poor decisions over the last few days, the heady taste of her on his tongue gave him just enough strength to get by.  Cloudy thoughts didn’t exactly clear, but a singular goal began to manifest itself amidst the fog.  Logical thoughts couldn’t take root with his sharp mind dulled by the fruits of his obsession.  In this primitive chemical-induced haze, what was once an innocent goal mutated into an ugly animalistic instinct.

He needed to breed the female human.

He needed to claim her before the other males did.

There was still a faint glimmer of sentience left in him, threatening to be snuffed out by his carnal nature.  It wasn’t enough to conquer his heightened libido; just enough to make him queasy as he succumbed to it.  Even as he pulled his face away from her core, he couldn’t bring himself to raise his eyes.  Deep inside, he didn’t want to look up and see the lady he loved as nothing more than a mate to impregnate.  The vision of his brothers passing her around darkened that spark of consciousness, making him both nauseous and irrational. 

He could hear their voices around him, but he couldn’t understand their words.  Their laughter echoed as he raised himself back to a kneeling position with trembling arms.  He willed his heavy limbs forward, crawling atop her body.    Though he moved with great difficulty, he managed to mount her before collapsing.  Her soft flesh yielded to his plastron, cushioning him.  Lucious thighs dutifully parted wider to accommodate.  He twisted his head to bury it between her breasts.  The sound of his mates racing heartbeat drowned out the drivel.  He inched closer until his constricted arousal nudged her clothed mound.  A low growl rumbled in his chest with each dry hump. 

Driven by pure animal magnetism, he rutted against her.  Frustrations grew when he was unable to make the contact that would quell the tension in his loins.  In his stupor, the concept of clothing didn’t exist.  He couldn’t understand why his efforts to mate her weren’t successful.  It took hands that were not his own to free him from the confines.  The foreign contact was exasperating to the point he wanted to gnash at the source.  It soon vanished, and with it, the distraction from his current motive.  His hips nudged forward again.  This time, the flared tip of his member caught her folds.  He adjusted his hips and tried again… and again… and again, forcing each intimidating, girthy inch of his inhuman penis inside until he felt the moist embrace of a hot-blooded mate swallowing the majority of his length.  His mouth fell open from the sensation of filling her tight passage; a low groan tumbled out.  He continued rutting, grinding his pelvis against hers.  It was not fast nor rough like one would might have expected from a mutant in heat, but as clumsy and maddeningly slow as one would expect from testudines.

He was content to continue like this until his seed was sown, but the hands around him had other plans.  Two strong hands grabbed him by the shoulders and his arms coiled around his mate possessively.  They pulled him up on his haunches.  This new angle allowed her to sink further onto him, allowing him to be fully sheathed.  The stink of another male sullied the pleasant, intoxicating scent of the female.  He wasn’t willing to share.  This one was his, who would bear his offspring.  With a snarl, he lunged forward, out of the grip to pin her back against the ground. 

His motions were frantic now, more frenzied as he worked vigorously to ensure successful insemination.  It was a race against time.  Though sufficiently virile, he had enough awareness to acknowledge that he wasn’t the biggest or the strongest male present.  If he wasn’t quick, he could quickly be overpowered and lose his claim.  That couldn’t happen.  It wouldn’t happen.  She’d be bred before he dismounted her.  His cock pulsed as he drove it in over and over again before eventually spasming.  He came with a pathetic groan, burying his face further into the chest below him as he cried out.  A sense of pride welled in his chest as he felt his release erupt following the successful copulation.

Now, he had to protect her to prevent the others from coming behind him and finishing the job.  It wasn’t the easiest task.  They made noises that sounded like something he should understand, but couldn’t, so he felt threatened.  He had to snap and swat any who came close, and his exhaustion was growing. 

It was indeterminable how much time had passed, but the air around him had cooled and his temples throbbed.  He held his forehead as he sat up, shaking it in an attempt to clear it.  He felt around for his glasses, finding his pants first before locating the frames.  After placing them on his face, he was able to see that his lab was a complete mess.  The pungent smell of… “relations” was prominent.  He looked down, seeing Dani beneath him in only her bra.  With a gasp, he leaned down to scoop her up.  He held her to his chest as he scanned the lab again.  There was dread in the pit of his stomach, and a massive gap in his memory.  His blood turned to ice when he saw the whiteboard.  Eyes scanned the formulas in horror before drifting over to land on the flask on the workbench.

“Do you… think it worked?”

Dani’s soft voice startled him.  He looked down at her, confused.

“Wh— Do I think what worked, Dani?” he croaked.  He hadn’t realized how hoarse and dry his throat was until that moment.

“The serum…”

Donatello closed his eyes, breathing and trying to settle his nerves.  Things were starting to fall back into place, and he could feel the bile threatening to bubble up his throat with these revelations.

“I-I don’t know,” he said.  “I don’t…  I’ll have to check you out.  I’ll have to make sure it didn’t have any adverse effects.  It was designed to be injected; I don’t know what dangers the gas produced from that specific ratio could have—”

A finger pressed to Donatello’s mouth prevented him from rambling.

“It’ll be okay, Donnie,” she assured him.  “Let’s clean up.  You can run a few quick tests to ease your mind, but we need to get you out of this lab and get you some proper rest before we run into something like this again.”

He shut his eyes and took a deep breath, nodding before holding her bridal style and rising to his feet.