The attic hatch swung open, landing with a heavy thud on the dust covered floor. Gwen Peters, in a frenzied panic, scrambled up into the narrow crawlspace of her parents' home. She coughed violently as her laboured breathing drew stale, dirt filled air into her heaving lungs.
Gwen swung around as soon as she'd cleared the opening. "Haley! Hurry!" she yelled, reaching to help her younger sister.
Haley took Gwen's hand and grunted as she lifted her upper body into the room. Before she could pull herself up completely, however, something grabbed hold of her ankles and started to pull her back down again.
"AAAAHH!" she screamed. "They've got me, Gwen! HEEEELP!!"
Gwen held on as tightly as she could and looked over her sister's shoulder. At the base of the attic's retractable ladder, two naked women had grabbed Haley's legs and were doing their best to pull her back down into the hall.
She recognized one of them as their neighbour, Mrs. Stevens. The woman was their mother's age, and a longtime friend of the family. She had a daughter who was just a few years younger than Haley, and in her junior year of high school.
Gwen couldn't be sure, but she thought she recognized the other woman, too. She looked like she was their mail carrier. She was younger, in her late twenties, with long blonde hair. It was normally held up in a ponytail, but now it cascaded over the crazed woman's shoulders in a messy, unkempt mane.
The blonde woman was running her tongue over Haley's calf and moaning breathlessly. Gwen cringed and looked away. "Hold on!" she shouted.
Bolstered with adrenaline, Gwen used all her strength to pull her sister gradually up the ladder. Haley managed to kick her legs free momentarily, and the two sisters tumbled back onto the attic floor.
Gwen was first to recover. She clambered back to her knees and swung the attic door shut just in time.
The frightened 22 year old sat on the hatch just as the women underneath her shoved it hard from below. The force caused her to jolt unsteadily, but she managed to hold her position.
"Haley! Quick! Push that trunk over here!" she shouted.
With tears streaming down her face, Gwen's petrified younger sister whirled around, spotting the large chest in the corner. She rushed toward it, fighting back sobs of terror, and dragged the heavy container to the middle of the room.
Together, Haley and Gwen moved the trunk on top of the door, and both collapsed on top of it. They waited, hearing a few muffled thuds from below, but no longer felt any movement.
"I... I think it'll hold..." Gwen panted, turning around to a seated position and holding her hand to her chest.
Still trembling, Haley crawled shakily to the floor and sat, hugging her knees to her chest. "W-what do we do now?" she sniffed.
Gwen took out her phone. "I'll try Mom and Dad again." she said.
After several rings, she sighed and hung up. "Still can't get through to either of them." She tried another number. "And 911 is still out of service, too."
Up to this point, Haley had been holding back her tears, but they suddenly spilled forward with unimpeded force. She sobbed like a child, her body convulsing uncontrollably as her chest heaved.
Gwen slid to the floor in front of her 19 year old sister and wrapped the girl up tightly in her arms. "Shh... It's... it's going to be fine." she murmured, even as her own tears began to flow.
She sniffed, and felt Haley's shaking arms reach around her, returning her comforting embrace. The two sisters clung to each other and cried. The situation seemed utterly hopeless...
The epidemic seemed to have spread in just hours, moving across the city like wildfire. Women were stripping naked all over town and attacking each other, spreading the infection through the exchange of bodily fluids.
Once infected, women became sexually ravenous, desperate to fuck members of their own sex. They were raping each other in the streets, pulling each other down to the ground and fucking violently. The men of the city were unaffected by the disease, but also seemed helpless to stop it.
"What do we do?" Haley sniffed. She rubbed at her bare calf absently. The blonde mail carrier had scratched it pretty badly with her fingers, drawing blood in more than a few places.
"We'll spend the night up here. I'm sure they'll move on after a while, then maybe we can make it to the car and go for help." Gwen knew the plan she'd put forth was hopeless, but tried to make herself sound convincing, all the same.
Haley didn't say anything. Instead, she looked at the attic door. Sounds were beginning to drift up from below. They could hear women moaning... the sounds of sex drifting through the house. It seemed the mail carrier and their neighbour had turned their sapphic attentions on one another.
The sisters did their best to ignore the noises. They found some sleeping bags from a pile of old camping equipment and laid them out on the floor, with some extra blankets to try and make themselves as comfortable as possible.
Both girls were exhausted, but neither of them could sleep. The women who had attacked them were still going at it, and their cries of ecstasy were more than enough to keep the sisters wide awake.
Eventually, though, the house grew quiet again, and Gwen drifted off. Haley wasn't so lucky, unfortunately. She tossed and turned on the blankets. Her calf tingled strangely, and her skin was clammy with sweat. She felt as if she were growing feverish, and strange thoughts began to creep into her head. Thoughts of naked women...
'No...' she thought, as it dawned on her what was happening. She pulled off the flap of her sleeping bag and touched the scratch marks on her leg. 'Not from this!' Panicking, Haley shook Gwen's shoulder, waking her older sister.
"Mm? Haley?" Gwen murmured, as she shook the cobwebs from her head. "Wazzi matter?"
Tears were streaming down her sister's face again. Gwen reached out to her, and was surprised to feel Haley's skin was hot to the touch. The younger girl bit her lip, and pointed at the scratches on her calf.
"I... I think I... I..."
Realization dawned on Gwen's face. "No... It can't... You can't turn from a few scratches... Even with that woman licking at them, barely any of her saliva would have..." she looked up from Haley's scrapes into her face again, but the girl's expression had changed. Where she was crying moments before, she seemed calm, and her eyes bore into Gwen's with an uncomfortable intensity.
Gwen gasped, and leaped to her feet, running for the attic door. Haley was too fast, though, and lunged at her sister's ankles, causing her to fall hard over the trunk that still blocked the exit. The air rushed out of Gwen's lungs when she fell, the edge of the chest jamming hard into her stomach.
While she was stunned, Haley clawed at her sister's shorts, ripping them off of her in one quick, strong motion.
"NO!!" Gwen screeched. "Not like this! Not with you! I'm your sister!!"
Haley wasn't listening, though. Her eyes were glued to her sister's pussy, and she salivated at the sight. She pinned Gwen roughly to the trunk, and dove forward, swiping her tongue greedily through the older girl's tender folds from behind.
Gwen gave a shudder, disgusted and terrified. She was surprised by Haley's strength, however, and couldn't seem to pull herself away. Her shorts were wrapped around her ankles, preventing her from even trying to kick herself free.
Haley was gorging herself on her sister's cunt, now, her tongue burrowed deep inside her, and her nose pressing hard between her naked butt cheeks. She moaned as she savoured the sweet flavour of pussy, the only flavour she would ever want to taste again...
Gwen struggled to resist her sister's lashing tongue, but she could feel her body betraying her. She was beginning to feel hot, and her pussy was beginning to get wet. 'No...' she thought, weakly. Her thighs spread wider, and Haley mewled happily.
She raked her tongue through Gwen's pussy, dragging it up to her sphincter and stabbing it through the tight opening. Gwen grunted as she felt her anus being pushed open. At the same time, Haley plunged three fingers into her big sister's cunt. It was already wet enough to take them easily.
Gwen's breath rasped as she hung helplessly over the heavy trunk, her hair hanging over her reddening face. Her breasts mashed against the hard surface through her t-shirt. Haley's fingers sloshed as they pumped relentlessly in her flowing cunt.
'God... I can't stop myself...' Gwen thought, as she pushed herself back harder against her little sister's face. She could already feel the virus taking over. "Ooooo... Haley!" she groaned aloud. "D-d-don't stop! Fuck my pussy!"
Haley grunted in response, and eased a fourth finger into Gwen's dripping gash. She bunched them together, twisting them with every thrust so she could scrape her nails against her sister's inner walls.
By now Gwen had given herself completely over to the virus, all will power leaving her undulating body. She struggled clumsily to kick herself free of her shorts, which were still bunched and twisted around her feet.
With one smooth gesture, Haley helped yank them the rest of the way off, then flipped Gwen over easily so she was laying on her back. Her fingers continued to pummel into her sister's pussy, and she took Gwen's clit between her teeth, biting hard and twisting the swollen nub.