Scalpel

Kathryn reached over the desk, hand grasping the pointed bit of metal. The scalpel was small, but it had a wicked blade designed to cut skin. Should do a good job of handling the undead. The others had headed farther down the second floor, and Kathryn raced to catch up with them. As she reached them, the intercom came alive again, "Looks like you handled those zombies easily, keep going to the lab wing. I can only see a few zombies in your path." Olivia flinched as the noise echoed through the otherwise quiet hallway. "Be quiet you idiot," she hissed, making a shushing sign with one hand as she waved at a nearby camera. It was already too late, however, to avoid making a scene. Zombies came shuffling around the bend in the hallway before them, clear eyes focusing on their newly found prey. "Other way, other way," said Peter, gesturing back the way they'd come. They turned back towards the receptionist's desk, only to see two zombies coming at them from the opposite end of the hallway. "Okay, we'll do this the hard way," Olivia said, before running back towards the two zombies

Kathryn didn't know what to do but follow her as she charged at the undead, who in turn began running full sprint at her. A loud screech sounded from behind her followed by a explosion of footsteps on the tile floor. Sure enough, when Kathryn looked back, the other group of zombies were running after them. "Don't stop," Olivia yelled, right before swinging him crutch into one of the zombies in front of them. Peter certainly took her words to heart, as he plowed into the other with his shoulder, pinning it between him and the wall, before bouncing off and continuing. With the path clear, Paige and Kathryn followed behind, side stepping the laid out zombies, and turning the corner. Kathryn turned back to see if the undead chasing them were gaining, only to run head first into something fleshy. Kathryn fell backwards, landing on her butt, left staring right at the throbbing green cock of a zombie. A massive zombie had stepped out of one of the patient rooms just in time of Kathryn to face plant into him.

He might be the least of her problems however, as the horde behind them was descending on Kathryn. Right before a pair of green hands would have grabbed her, Peter appeared shoving the zombie back. Kathryn lept to her feet as Paige and Olivia rushed past her to help Peter fight the undead. With her friends preoccupied, Kathryn held up her scalpel, hands trembling, as the zombie man staggered towards her. Before she could lose her nerve, Kathryn closed her eyes and stabbed the scalpel forward.

The blade made no sound as it pierced the skin, but Kathryn could feel the resistance of it moving through flesh. She caught the zombie square in the throat, burying the blade in its entirety. The zombie, however, seemed unbothered by the new hole in his neck, and continued advancing, grabbing Kathryn by both shoulders. "Get off me," Kathryn yelled, struggling against the zombie's grip. Kathryn pulled the blade from the zombie's neck, green blood spilling from the wound, and started stabbing him again and again. The blade slid into and out of neck, until on the third stab, she hit a blood vessel. Blood sprayed out of the zombie's neck, hitting Kathryn in the face and neck as the zombie staggered backwards, grasping at its neck. Kathryn recoiled from the spray of blood. Behind her the zombie fell to a knee, blood running through its fingers down its body, before finally collapsing on the ground, but Kathryn didn't notice. She wiped at her eyes, her shirt sleeve coming away green.

Kathryn felt her breath hitch, as she felt the blood run down her face. This was fine, everything was going to be fine. Yeah the virus was transmitted through bodily fluids, but surely that didn't include blood. But something inside her was already shifting, a heat swelling of from her nether regions. "No... I'm fine... I won't..." she whispered, but her hand was already moving, sliding down her stomach, snaking under her clothes to touch bare skin. Her mind screamed to stop, but Kathryn wasn't in control. Her body moved on its own, propelled by a force not her own. She couldn't resist, the tingly feeling penetrating her mind. The horniness, it was unbearable, she had to, she couldn't stop herself.

Kathryn squealed as her fingers penetrated inside her, filling the desperate need. She pushed deeper, adding a second finger, stretching her tight pussy as she began to pump in a steady rhythm. Her fingers slid in and out of her, lubricated by her growing wetness, arousal leaking from her folds. “Fuck… fuck, it’s so good,” she moaned unabashedly, her head lolling back. Her thighs trembled, the muscles clenching as she drove her fingers faster, the squelching sound of her own wetness audible. She could feel the virus inside her spreading as she became more and more aroused, taking control of her. If this was what being a zombie felt like, however, she was ready to become one.

Kathryn looked up to find Paige watching her, horrified by the sight of kathryn's hand moving rhythmically under her pants. She was so distracted that she didn't see a zombie nurse grab her from behind and pull her into a kiss. Paige crumpled as the zombie pulled her to the ground, into a tight embrace. She'd be one of the horde too, just like Kathryn. Peter wouldn't be far behind them, lying defeated on the ground as a zombie with long black hair sucked him off. Olivia was the only one left standing, but as Kathryn watched, the remaining zombie overwhelmed her, pulling her to the ground in a writhing mass of green flesh. It was over for all of them, soon they would cum their brains out and become mindless zombies, slaves to the pleasure of the horde. As Kathryn rubbed her clit with her thumb, she couldn't think of anything better.

Her mind was barely able to form a thought anymore, as Kathryn raced towards her inevitable orgasm, fingers plunging in and out of her, stroking her clit and pressing against her walls. With one final flick, Kathryn felt her orgasm burst, pussy clenching around her fingers. Fluid spilled out from her, forming a splotch on her pants, before running down her thighs to pool on the floor. Kathryn's legs gave out from under her and she fell into the puddle of her own arousal, moaning with ecstasy. The pleasure was blinding, overwhelming, drowning every conscious thought and searing away Kathryn until the only thing left was a burning need to fuck and spread the zombie virus. Green spread outward over her body, down her neck, over her breasts and to her toes, fully turning her into one of the undead. As Kathryn opened her now blank eyes, a low, guttural moan escaping her lips. Her friends lay nearby, moaning as they too each succumbed to zombification and joined the undead orgy.