A few days in, a brother is trying to hold on, despite his sisters

Declan could practically feel his mind melting. It had been days since the pornographic interview about the Contagion had appeared online and the town had been summarily isolated by the inescapable plant wall. It hadn't taken long to realize that the disease was trapped inside with them, thanks to a few random orgies breaking out in town and the local prep school. It had spread quickly after that, though Declan couldn't say just how quickly, thanks to his parents.

As soon as they realized things were going to hell, Declan's parents, Martha and Yanek, had told him and his sisters to stay in the house while they went for supplies. Their plan was to barricade themselves in until a cure could be found or they could at least be rescued.

That had been five days ago and Declan hadn't seen his parents since, and anyone who said differently was wrong. Those people usually being his four sisters, two older and two younger, who he had always gotten along with well enough in the past but were now an almost constant source of aggravation. All of them being cooped up in the same place together without the ability to so much as leave the house was infinitely more stressful than he ever would have thought.

"Hey Dec, have you seen one of my necklaces around here? I was wearing it the other day and now I can't find it."

"I haven't seen it, Vikki. Have you checked the bathroom?" he answered, sparing a short glance at his youngest sister from his bed. He quickly looked away when he saw her in all her teen, white haired glory. He had to admit his sister, really all of them, was extremely attractive. He blamed his father's Slavic blood for that, blood that seemed to run especially true for Vikki. Her short stature, pretty face, grey eyes, and curvy body all created an alluring image, especially when that was combined with the tight and revealing tube top she was wearing.

"Oh, I'll check there, thanks!" Vikki said, quickly walking off in search of her lost jewelry. Declan tried to focus on the book in his hand, but the image of his sister wouldn't leave him, something that had been happening with increasing and disturbing frequency. He'd always accepted that his siblings were fully capable of drawing the male gaze, as his friends had never ceased to point out, but never thought one of those gazes would be his. He tried not to look, to take notice, but it wasn't easy, especially when...

"Declan, did you drink the rest of my whiskey?" Especially when those he was trying to not watch made no effort to avoid being noticed. Case in point, Cora, his slightly older twenty four year old sister. Considerably more generously gifted in the chest department than Vikki and with long, dirty blonde hair, she had never really grown out of her rebellious teenage phase, at least in part thanks to the fact that she was hot as fuck, knew how to use it, and was the epitome of a social butterfly. People seemed to end up wrapped around her finger and Declan had recently had to make no small effort in not ending up the same, a task made all the harder thanks to the supremely open neck of Cora's white shirt. Not to mention she teased him endlessly. "Is my little brother sneaking booze from his big sister's liquor cabinet?"

"I had a glass last night, but it was hardly all of it," Declan said, abandoning his book in favor of staring at the ceiling that was just as white as Cora's shirt. He could practically see her deep cleavage and huge boobs superimposed there as a ghost of the real thing. "And I don't need to sneak it, I'm twenty two. I'm allowed to have a drink, especially when..."

"Uh, yeah, I guess that's fair," Cora said quietly, an uncomfortable silence stretching between them before Cora shook herself out of it with a hop. Declan was ashamed to admit his eyes darted to her chest for a moment to watch those tits wobble and he knew she saw him do it. She gave him a little smile and another small hop. "Well next time you want a drink, let me know, we can have one together." With one last slightly larger smile, she turned to leave, stopping short as she almost ran right into Adeline.

"Hey, watch where you're going!" Declan's fully brunette little sister yelped, hurriedly backing away from Cora. Adeline was the fourth child, a little more than a year younger than Declan and just about to turn twenty one. She definitely wasn't as busty as Cora, but still had a rocking body with full tits, a skinny waist, and nice hips. Her entire body was toned from exercise, but she somehow managed to keep all the necessary body fat in the best places. She could also be a bit of a bitch at times and more than a little inflexible if she wanted to be, but she also took no shit from anyone, regardless of who they were. A brutally honest type, not afraid to tell the truth, a trait she apparently also looked for in her clothes if her current attire was anything to go by.

Declan, for just a minute, lost his fight to not ogle his siblings and examined every inch of Adeline he could see. Her long brown hair was gorgeous and smooth, parted to one side and flowing down to her mostly bare shoulders. The skin there was only interrupted by a thin strap of pink that held up her shirt, if it could be called that. It looked more like a cotton version of a corset, all in pink and emphasizing her every curve. Her breasts sat firm on her chest and pushing out the fabric that cinched in a few inches later to hug the rest of her torso. The thin fabric stopped at her belly button, leaving lightly tanned, tight sink visible. Her jean shorts were unbottoned and unzipped, but still hugged her hips well. Declan didn't let himself imagine what they would look like worn properly, which was partially thanks to the hem of matching pink panties he could see peeking out from beneath the shorts. Long, slim legs completed the incredible picture and he **** himself to look away from his younger sister, not wanting to get caught looking by two siblings.

"Ade, why do you smell like ****?" Cora asked the brunette, making her stammer for an excuse. At least they knew where the whiskey went. "You're not even old enough to have it!"

"Oh shtop it, sissss. I's the end 'o the wurld anyways," Adeline said in a fake, drunken slur. She dropped it a second later under the unappreciative eye of her older sister. "It's not like I got wasted or anything, there was barely any left! And I'm turning twenty one next month, shut up."

"You can drink whatever you want, just not my stuff! We don't know how long we're going to be in here and I'm trying to make it last." Cora and Adeline continued to bicker, standing practically nose to nose. Not wanting to have the often-at-odds sisters' argument in his ears, Declan got up and stepped past them to go to the kitchen. Cora was nice enough to step aside to let him through, but also stepped right into Adeline and pressed their boobs together in an incredible squish. Declan caught both sisters shooting him a quick look before their argument resumed. Neither one moved away though.

Adding that sight to the pile of things he shouldn't think about, Declan walked into the kitchen to scrounge for something to nibble on. Adeline insisted they should ration their food, but none of them really tried. Besides, none of them were really all that hungry lately anyways. Case in point, Declan soon shut the fridge empty-handed, not finding anything that peaked his hunger.

"Anything good in there?" asked the mature voice of his last sister, and Declan turned to see Sonja standing in the doorway. The oldest of them all at twenty six, she was truly a woman and looked it. Soft blonde hair, pretty face, and a decidedly mature body all solidified that. Sonja's breasts weren't quite as big as Cora's, her waist wasn't as trim as Adeline's, and her hair didn't match the pure paleness of Vikki's, but she definitely won the contest for best bottom half, with big hips, firm butt, and lush thighs. With her still abundant breasts pressed into a tight, black cut-off tank top and her wide hips squeezed into what looked like swimsuit bottoms, she looked like a MILF in the making.

"No. I...can't eat. Not with everything that's going on. I'm not hungry for food."

"I get it, I haven't been very hungry either. I'm sure Mom and Dad would want us to keep our strength up, but with them...like that, it feels weird to think of them," Sonja said, glancing towards the living room and tugging at the upper hem of her tank top. With her eyes focused elsewhere, Declan's gravitated to the increasingly exposed slope of her tits as the fabric slid lower and lower, until the edge of her dark areola was peeking out.

For once, he couldn't move his eyes, even as Sonja turned a little and gave him a tiny smirk before putting her poor excuse for a shirt back into place. Declan didn't know whether to be glad or not, but he quickly jerked his eyes away, looking anywhere else.

"Would you please stop that?" he half-begged, trying not to look at the oldest of his sisters.

"Sorry, I can't help it. Even knowing what happens, a part of me doesn't care. She has her own little voice in my head now too. Just be glad I can control her, you wouldn't believe some of the things she's started to say." Sonja readjusted her top and bottoms to cover as much skin as she could, though it still wasn't much. She seemed apologetic, but was also pushing her chest out at the same time, so he couldn't really tell.

The trouble with his sisters had started the day after everything had gone crazy. During a rare moment when the sounds of sex and moaning from outside had lessened, they had gone around upstairs to open some windows in an attempt to relieve the feeling of being trapped. That had worked great until Adeline had asked for his help with a stuck window in her room. With a little brute ****, he had managed to get it open and let the fresh air in, only for Adeline to stumble back a step as she took a deep breath.

"Mmhh. Oh shit, I'm hot. Why am I so hot? Dec, you...you.....smell so good..." she had gasped and leaned against the window frame, before pulling her shirt off in one quick tug, leaving her leaning against her wall in only a bra and shorts, leveling a hungry look at him.

Somehow, he had managed to resist her and the call of his sudden boner, and slammed the window shut. As soon as the air flow was cut off, he felt his mind clear and watched as Ade seemed to experience the same. They spent five minutes quickly shutting all the windows they had just opened and shaking the other girls out of similar lusty dazes, which fortunately happened before any of them could strip out of their clothes, though they did try.

They all tried to put the incident out of their minds, but whatever had been in the air clearly had some lingering effects. All the girls started dressing in skimpier and more revealing clothes, citing the heat as the cause. That didn't explain all the things they did to attract Declan's attention though, like lingering around him and doing vaguely sexy things, like morning stretches, sunbathing in the living room, and bending over in front of him.

Thanks to all that, Declan couldn't tell if the near-constant boner he had was due to the air or his sisters. He tried to fight the dirty thoughts that somehow permeated his brain so much more easily than they had before and had asked his siblings to stop teasing him, which they had immediately promised to do before going right back to it. He couldn't tell why, if they were somehow being controlled and their bodies just did it, or if they had some perverse desire for him. He had decided he didn't want to know. Regardless, his sisters got more aggressive and seductive with him every day.

"I wonder if this is how they felt," Sonja mused, shaking Declan out of his own thoughts of the past days. "Slowly letting their inhibitions slip away until they..."

"I don't think there was anything slow about it," Declan said quickly before Sonja could continue.

"Sorry, I know you don't like to think about it. I just can't help but wonder why."

"I would think that was pretty easy. They got caught. First Mom by someone, then Dad by Mom."

"That's not what I mean," Sonja said with an annoyed sigh.

"Of course not. You're wondering why Mom turned into a toned, black elf and then turned Dad into a plush, white version of herself so they could be a slutty fantasy lesbian couple and fuck for days outside the house," Declan said flatly and with his own tinge of irritation.

"I was going to put it more delicately." Declan gave her a flat stare before he stormed past her, through the living room to the front window, and jerked the blinds open.

"Does that look all that delicate to you?" he asked, pointing at the intertwined pair of elves on the front lawn. They had matching long blonde hair and pointed ears, but that was about the extent of the similarities. One had skin the color of milk chocolate, the other was pale as cream. The dark one had defined muscles and sexy abs, the light one was all soft smoothness. One had a firm ass and tits, the other much more jiggly. The dark elf looked like a race-swapped, perfected version of their mother, Martha, the light elf was a genderbent rendition of their father, Yanek. They didn't stop fucking when they saw their children watching, but definitely gave them a smirk and a 'come hither' gesture.

"Okay, you made your point, I'm sorry," Sonja said, quickly closing the curtain again with a significant blush on her cheeks. "I'm just...this feeling, this need, is getting stronger every day. I know the other girls are feeling the same thing, more or less. And like it or not, you're the only guy here. You've got the only safe penis in reach and they're all competing to be the first one to get it."

"You're not? Competing, I mean," Declan asked.

"I'm trying not to. I don't want to be like them either." Sonja's words brought an unexpected sense of relief with them.

"Well, I'm glad I at least have you on my side," he said, smiling earnestly for the first time in days. Sonja smiled back, but flushed a second later and pressed a hand to her belly.

"Me too. But you should be careful with that smile or you might get jumped. In more ways than one." Now it was Declan's turn to blush.

"Sorry, I didn't think-"

"It's fine, I just...I'm going to take some alone time, if that's okay," Sonja said, not waiting for an answer before walking upstairs with a quickness in her step. Dec resisted the urge to watch her ass sway as she left and mostly succeeded. Instead, he looked down at his own crotch and the meat that was straining the fabric there. He could relate to what Sonja was saying, the itching urge he felt was probably pretty similar.

He would argue he had it worse though. If what his eldest sister said was true, the three/four of them were all competing to get him first, a flattering and terrifying thought all on its own. But he was the one surrounded by four potential partners, all of whom seemed to want him, and couldn't do anything about it. At some point, the fact that they were women would overshadow the fact that they were his sisters. He would break, he knew he would. He just hoped they were rescued before he hit that point.