It mostly seemed like any other day. 12-year-old Dave was home alone with his 8-year-old sister, Anna. Their parents had gone on a business trip for the week, and they were trusting Dave to look after his sister. Not that Dave had any issue watching her. They mostly got along with each other, and she wasn't as bratty as he's heard other boys complain about their own sisters.
The day was coming to a close. Anna had just finished her shower, walking to her room in a towel, as Dave entered the bathroom for his turn. The boy stripped off his clothes before looking into the mirror. He gave a quick glance at his short blonde hair and green eyes. He was fit, though not athletic. He lifted his arms to see still no trace of armpit hair. The same could be said for his groin. His boyhood was a bit over average for his age, though, something he was kind of proud of.
Just before Dave was about to start the shower, the ground began to shake violently. Earthquake?! It wasn't unheard of in this area, but they were often rare and weak. Not this one, though. It felt like everything was straining to keep standing. Dave held on to the counter, hoping to ride it out, until he heard Anna shriek.
Dave found energy he didn't know he had. He rushed out of the bathroom and ran into his sister's room. She was still in a towel, and her ceiling was falling apart. Everything seemed to slow down as the roof collapsed in. Going on instinct, Dave tackled his sister and shielded her with his own body. He felt debris fall on him as he held his little sister close to him. And then suddenly everything went black as something hit the back of his head.
Dave woke up a few hours later, his head throbbing, and he heard quiet sobbing. As the events of what happened hit him, he opened his eyes, but it was pitch black, the dead of night. He could hear sirens and other sounds in the distance, but nothing close. "A-Anna?" He asked groggily.
"Huuu, you're alive!" She gasped and hugged him. It felt odd, though good. It was fuzzy and cozy, as her hugs were, but there was something else. Wait. They were naked! He felt the towel under his palms, but it must have slipped off of her.
"Are you okay, Anna?" He asked softly.
"Mhm. You protected me." She sounded grateful, but then the fear returned to her voice. "What are we going to do?"
"Good question." He moved his hands to be more under him, and he pushed up, but barely a foot up he felt something sharp and metal stab his back. With a yelp, he lowered himself a bit to avoid it fully piercing the skin.
"What is it?" She asked, terror in her voice.
"I'm not sure. There's something metal close to my back; I can't move much more without getting hurt." He explained.
"So we're trapped here? Are we gonna die?" Her quiet sobbing returned.
"Shh. Shh." He used one hand to rub her face. He couldn't see it, but he felt it. "We just have to wait for rescue."
Anna slowly calmed back down, taking deep, shaky breaths. "O-Okay." She spoke softly.
"Try to get some rest. I'm sure they'll find us in no time if you sleep through it." He tried to soothe her more.
After a few minutes, everything went silent. Anna had tired herself out enough to nap, and Dave managed to position his arms so he could lie on them without putting his whole weight on her. And pretty soon he managed to get some rest too.
When he awoke again, it was from Anna shifting around a lot under him...and a strange feeling in his crotch. "A-Anna? What's wrong?" He asked her.
"Something is poking me between my legs." She struggled some more.
"Between your...shit!" He pushed himself up and yelped as he hit the metal again.
"Swear!" She called him out; it was habit. "What was it? Why did you move?"
"Anna...it's um...my penis." He figured there was no reason to lie to her. "Sorry, I guess it got hard from, um, touching you." He was a little glad it was still dark so she couldn't see him blushing.
"Your...ooooh..." She said quietly. "Why is it all hard?"
"It gets that way when I sleep or when I think about a cute girl." He tried to explain.
"I'm cute?" She asked in surprise.
"The cutest little sister I could ask for." He agreed.
"Um, it's okay if it touches me... I don't want you to be uncomfortable." she said softly.
While hesitant, he had to agree it would be more comfortable. He slowly lowered himself. Only one problem. As the boy lowered himself, it seemed all their shifting moved them slightly, because now the head of his boyhood pressed against her entrance. He felt her warm outer lips open to his head.
In a normal situation, he'd be overjoyed at the prospect of being in his first girl. But not here. For one, she was his little sister. Secondly, she didn't want it, nor did she know what sex even was. And so, Dave pulled himself back up. "Dang it." He self-censored.
"What's wrong?" She asked.
"If I move down. My, um, my penis is going to go inside you." He said softly.
"Like, in my butt? Ew!" She scrunched her face, but he couldn't see it.
"No. In your… in your vagina." He corrected.
"That can happen?" She asked with a stunned voice.
"It's... It's how babies are made. And a girl's first time having one in them hurts." He explained.
"Baby? Hurts? You can't put it in!" She panicked.
"Relax. I know. I know." He told her and sighed. She wasn't old enough to get pregnant, but that wasn't the point. "I'll just have to stay like this."
"But that's uncomfortable, right?" She asked.
"Those are our options. Either I'm uncomfortable, or it's going in you." He pointed out.
"Oh..." Anna went silent after that.
Dave held himself like that for the next hour or so. He wasn't good at telling time like this. However, there were small beams of light, meaning the sun must be starting to rise. Every now and then he'd feel himself go weak, and he'd jerk up, grunting from the pain of the metal.
The sirens didn't seem any closer than before. Who knew how long they would stay like this? How long he'd have to stay up like this. And his erection wasn't going down thanks to the head rubbing her lips every time he weakened, and her slit was getting quite wet. But hopefully they'll be out of here soon.
Another hour passed, and Dave's arms were burning, desperately holding him up. "Put it in..." Anna spoke quietly, almost in a whisper.
"Huh? What do you mean?" He asked in a strained voice.
"Put your thing in me, then you can rest." She explained. "I don't want it to hurt, but you're in pain right now."
"Anna. I can't do that to..." He was cut off.
"Do it, big brother! You've been protecting me this whole time. Let me be brave and let you rest." She sounded determined, terrified, but determined.
Dave hesitated, but he had to admit he couldn't hold out any longer. "I'm sorry, Anna..." He said it quietly and slowly lowered himself. His penis pressed against her slit, then slowly popped into the small opening. He felt a barrier of skin against his head. He squeezed his eyes shut. "I'm sorry." He then thrust his hips to get it over with. He tore past the barrier and sank deep into his very first girl, his own sister. He used his arms to lie on and stop from crushing her still.
Anna was letting out tiny sobs. Dave felt absolutely amazing inside her tight hole but also extremely guilty. He just stole her first time from her before she had the chance to learn of its importance. Dave gently pressed his forehead against hers. "Sorry...so sorry." His penis only hardened more, throbbing inside her tight tunnel. Anna felt the pain, but her slit seemed to happily ripple around him.
After just a few minutes, her slit relaxed around him, and her sobbing stopped. "It...doesn't hurt anymore."
"That's good. At least now you aren't uncomfortable too." He said quietly.
"It feels so...full." She sounded a little confused. "Is...there any way to make your thing soft again to get it out?"
"There is, but it means I need to move around inside you." He already penetrated her, but he didn't want to have proper sex with her. That was the line he decided to make between survival and incest.
"That's okay. Please do it." She begged, wanting to help him get out, thinking he wasn't enjoying this.
"Anna.....okay." He decided to accept. If he could pull out of her and reposition, they'd be out of the awkward position, even if it means having real sex with her. "Sorry..." He apologized again as he pulled out some and then thrust back in. He already crossed his line. But it was incest for survival...right?
Dave began to slowly piston into her young tunnel. He started to huff with his movements, and he started to hear Anna let out cute little moans. As it became clear she was enjoying it too, he sped up. Now properly thrusting into his little sister, he got his taste of real sex, and yeah, it was amazing.
Being his first time, he wasn't able to last long. And as instinct took over, he pounded her before pushing fully inside her. His cum gushed out against her tiny cervix, his body trying to complete the process that couldn't be done. And as he finished filling her, he was about to try and pull out until the rubble on top of them shifted, leaving them with less space. And even now while soft, his boyhood was stuck halfway inside her.
"Shit!" He cursed.
"Swear! Um, what happened?" Anna was still a little dazed from her first time, and she hadn't cum yet.
"The stuff over us shifted. I can't move higher than right now." He explained.
"Oh...then you're stuck...inside?" She asked.
"I'm afraid so." He said softly.
"Um...okay. If you can't get out...can you do more of that stuff?" She looked away.
"More? You want more of it?" He asked. The girl blushed and nodded.
Dave hesitated, but seeing as he couldn't do anything else about it, maybe he could pass the time with it? He felt himself harden again in her cum-lubricated slit. "Okay..." With him agreeing, he started to thrust once more.
Now it was no longer survival; he realized that excuse was gone. Now it was simply sex. Him thrusting into his little sister, taking pleasure from her tight, little slit, making the most of it. And Anna moaned right along with him. When he grew close to his next orgasm, he heard her cry out, and her slit spasmed and squeezed him like a vice. He pushed deep and pumped her full once more.
And for the next many hours, every time Dave grew hard, he'd have sex with her again and again and again until his penis refused to get hard again. He felt cum oozing out around his penis, and a puddle of their mixed juices was beneath them.
Dave started to think no one would come today, and he was starting to fall asleep...and then he heard the sirens grow close again. He heard shouting, movement, and other noises close by. Were they close? Dave felt small debris fall on him as the rubble was moved away from over them.
"I FOUND TH-woah." The man was shocked by the sight. Dave had blood all over his back, and of course both kids were nude, and it was pretty clear what was around them. "BRING TOWELS!" He shouted.
The kids were helped out, covered in towels, and taken to separate ambulances to be checked over, and questioned.
Dave broke down into tears when he started explaining what happened. He was now filled with so much regret over what happened. He expected to be punished for doing that with his sister. After some time getting bandaged and cleaned up, he was given clothes to put on.
After some time, an officer came up to him and informed him that no one would talk about what happened. His sister gave the same story, and they viewed the whole thing as accidental and working with what they could in the moment. They also praised the boy for protecting his sister during the earthquake.
The siblings were allowed together again once brought to a shelter for everyone who lost their homes. Several hours later, their parents finally arrived, having rushed here the second their flight finally landed. Their mom hugged the both of them and cried over how sorry she was for leaving them all alone.
They soon booked a hotel to stay in while they scavenged through their house, which was now just a pile of trash, for any personal items they could recover. The four of them slept in the same bed for a few nights, their mom not wanting to be far from them. But soon they wanted to have their own room in the hotel, and they moved to joined rooms.
The siblings had a bed each, but they ended up sleeping in the same bed. Their relationship was forever changed. And while their previous sex wasn't intended, they couldn't help but crave more. Dave pumped cum into his sister once a night while in the hotel.
Months later, the family moved into a new house. Their old street was basically flattened and had to be rebuilt, so they chose to just find a new home. And even as the siblings got separate rooms again, they always found time for sex.
And as the years passed, Dave started using condoms until Anna was old enough to get birth control. The siblings kept their sexual relationship all the way up until they found someone they wanted to marry. Even then they found it hard to resist the desire, but for their loved ones, they did.
But after so many years, when they caught their own kids committing incest, they weren't entirely surprised, but that's for another story.