Caught in the Act
Ah, sis, I-I came so good...♥! "Hngh, hiiiit...♥!" Park Ah-young kept babbling "What do I do, what do I do" before her body finally went limp and slumped against me. I supported her back with one hand and let her head rest on my shoulder as it lolled backward.
"...It's hot in here. Let's go inside."
"Haah... hngh, haaang♥!" Thick spurts of leftover cum pumped through my urethra and flooded straight into her womb. Park Ah-young's belly swelled visibly, rounding out from the sheer volume.
"......What are you doing?" Her voice was flat, almost eerily calm, carrying a chill that made my skin prickle.
"Having sex?"
"......With who?" From the situation alone, and especially from the view of my back, it should have been obvious whose older sister she was looking at. Still, Park Eun-ji's face stayed rigid as she asked again.
"...I'm asking who that is right now."
"Hmm..." She wasn't cursing me out. She wasn't swinging fists or resorting to violence either. It didn't even feel like she was angry. After the way she'd pounded on the door and hurled insults earlier, I could hardly believe it was the same person.
"...I'm asking who it is."
She simply stood there with that stiff, blank expression, staring at me. Strangely enough, this was the most terrifying moment I'd experienced since getting involved with Park Eun-ji. No matter how hard I tried to stay calm, my throat felt tight and prickly.
"......Gulp."
"Can't you hear me? I'm asking you a question."
It felt like a knife was pressed against my neck, but I didn't let it show.
"A-Ah... I-I can't... I can't hold it anymore..."
Park Ah-young mumbled something under her breath just then. Her body, already trembling and weak, seemed to melt like liquid.
"A-Ah, hngh, haaa..." Her pussy convulsed hard. The walls fluttered and squeezed my cock tightly before a loud hissing sound echoed through the entryway.
"Hngh, haaaah...♥!!" She threw her head back. Her breasts, marked with my bite prints, bounced heavily. Water dripped down in steady drops, forming a small puddle beneath my feet.
"Hngh, haa... haa-eung...! S-Sorry... Eun-ji, I'm sorry... Sis, I-I came so good...♥!"
What followed was an orgasm. The timing was a little awkward, but Park Ah-young looked like she'd completely lost herself to climax right in front of her own younger sister.
"Eun-jii... S-Sorry! I didn't mean to do this... but, haa, hngh...♥ I-I ended up having sex with your boyfriend... with Dohyeoni..."
It was an unexpected confession. The way her pussy kept clenching made me wonder if she was secretly enjoying this.
"I-It's my fault...♥ So don't get too mad at Dohyeoni, okay...? You understand, right...?"
Park Ah-young forced her head around to meet Park Eun-ji's eyes. Her pussy tightened again, full of pleasure, and even though she tried to hold back her moans, sweet cries still slipped out between her lips.
"Kkeung...♥ I-It's all my fault... Sorry, Eun-ji, I'm sorry..."
Park Ah-young's eyes were even glistening with tears. Park Eun-ji, looking shocked, asked in a trembling voice.
"...Sis, what the hell did that bastard threaten you with to make you go this far...?"
"N-No...♥ It wasn't a threat or anything like that... really...♥!"
Park Ah-young's thighs trembled. Her hips twitched on their own. Lewd, wet sounds filled the air with every movement. Park Eun-ji just stood frozen like a statue, staring blankly.
"...Close the door first."
"......"
Her lips stayed tightly shut. The wide-open front door was starting to feel awkward. I took a step forward.
"Hngh...! Ha, ha-euk♥ Hiii...♥!"
I scooped up Park Ah-young's limp body. Even while she was melting, she wrapped her legs tightly around my waist.
"Kyaa, kya-heut...!! I-I really can't anymore!!"
There seemed to be a limit to pleasure after all. Park Ah-young's face clearly showed she'd reached her peak. Moments later, her eyes rolled back and her body went completely slack.
"Noona, you okay?"
"Heh, hehehe... P-Please put me down... I-I'm really gonna go crazy at this rate...♥"
Tears streaked her eyes and drool ran down her chin. Her gaze was unfocused, like she could pass out any second.
Thud, thud.
"Ha-eung... R-Right there... hngh!"
When I patted her ass, she quickly buried her face against my chest and squeezed her pussy walls around me, throwing a cute tantrum.
"D-Dohyeoni... haaang...♥ Please put me down... I'm really dying, okay? Please..."
Park Ah-young whispered desperately. I just stared at her quietly.
"...Lick, lick lick..."
A small tongue peeked out between her lips and licked my neck. The pretty pink color stood out.
"Ang! Ang! P-Put me down..."
She was even imitating a puppy, doing something I never asked for. Imitating? Who...?
A memory surfaced. The motel. The one with poor soundproofing.
"You were listening in that day, weren't you?"
"...N-No...? I-I don't know what you're talking about...?"
"You're lying to me right now?"
"...I-I wasn't listening on purpose... I-I just heard everything because it was so loud outside... I-I'm not lying, really!"
Stroke, stroke, stroke.
"Hi, hihit... But seeing Eun-ji like this... I-I can't help it..."
My hand petting her head seemed to bother her. She kept glancing between me and Park Eun-ji with an embarrassed yet pleased expression.
"Should we go wash up?"
"...Now?"
"Yeah. Noona made such a mess—"
"A-Aaang! D-Don't say it like that... Y-You made me like this...♥"
Honestly, Park Ah-young's behavior was confusing. Earlier she'd acted like getting caught would be the end of the world, but now she was looking at me with honey dripping from her eyes, as if she wanted Park Eun-ji to see everything.
"Hey, Park Eun-ji."
"......What."
"Clean this up. Since Noona made the mess, half of it is basically yours too."
"Yaa... H-How can you say that? N-No! I'll clean it up later!"
Park Ah-young looked flustered but quickly put on a fox-like smile. Her pussy walls kept pulsing, refusing to let go of my cock.
"Then we're going to wash up."
Clack.
I finally closed the front door. The loud electronic sound of the lock echoed through the house.
Step, step, step.
"Hngh! Heh, ha-eung... ha, haaang...♥"
Park Ah-young didn't look normal at all. The pleasure was so overwhelming that I started worrying something might actually be wrong with her.
"...Noona, you're really okay, right?"
"Mm-hmm. I-I'm feeling so good right now... I wanna stay like this a little longer..."
She rubbed her face against my chest and even nibbled lightly on my neck. Her soft tongue trailed up along my neck to my ear.
Thud.
We stepped into the bathroom. I loosened my grip on her ass and shoulders.
"...Why?"
"I feel a little sad letting go... Just a bit longer, like this..."
She seemed to have adapted... or maybe the afterglow had finally faded. Either way, her pussy was still twitching around my cock.
"Haa... I really don't want to let go, but I'm actually getting tired now... You know?"
She was acting much more affectionate than usual. If the original Park Ah-young was just cute, now she seemed to be putting her all into pleasing me.
"We can just do it again. It's not like this is the last time."
"Ah... Again? I-I can have sex with Dohyeoni again...?"
She actually asked for permission, as if she needed it. Instead of nodding right away, I held back a laugh, my lips twitching.
"Ah, whyyy... Do it with me too."
"Why should I?"
"N-No... You were the one who seduced me, Do-hyun... S-So if you do it with her... then what about me...?"
"You were the one who put my cock in your mouth and sucked it while I was sleeping."
"...Yaa. That's completely different from this!"
"Well, I'll think about it."
"Ah..."
Park Eun-ji's eyes drooped. Her face was clearly filled with disappointment and worry.
"...Am I... not good enough...?"
"Not good enough? What do you mean?"
"I-I mean... compared to Eun-ji... do you like doing it with her more...?"
"What do you think?"
"A-Ah, ugh! I-I just haven't done it that many times yet...! If I study more, no... I'll go study and come back!"
"Study?"
"Mm-hmm. I'll practice and come back... so can't you do it with me more...? Please?"
It was getting hard to keep a straight face. Beyond the physical pleasure, I was enjoying a deep sense of relief.
"So like an internship?"
"I-I-Intern...?"
"What, you don't like it?"
"No! I-I like it! I'll do it... that internship."
"Okay. Then I'll promote you to full-time after watching how you do."
"Heh, hehe... When you say it like that... it feels a little weird..."
She didn't look upset. She just seemed a bit disappointed about being considered a temp.
"...Am I really that bad? Is that why...?"
That wasn't the case at all. Her constant comparisons to Park Eun-ji were starting to make things awkward. I almost said I'd never done it with her before, but swallowed the words back down.
"...As expected, you're cuter when you're smaller."
Park Ah-young gently washed my cock with her hands. Her touch was subtly seductive, like she was trying to get me hard again. After finally getting me erect, Park Eun-ji had left the bathroom smelling like cum again in no time.
"A-Aang...♥ You could do more..."
I ignored Park Ah-young's disappointed voice and roughly dried myself off before opening the door. Our bodies, warmed up in the bathroom, were quickly cooled by the air conditioner. The cool air felt almost chilly.
"...Finished?"
"Yeah. As you can see."
"You're just gonna leave Noona like that?"
"...Uh, well... what should I do?"
Park Ah-young was still clinging to my waist from behind, her hands kneading my now-erect cock.
"U-Uwaaang!"
With Park Ah-young still attached to my back, I walked forward. Park Eun-ji stood there facing our naked bodies. Park Ah-young's hand pressed my hard cock firmly against Park Eun-ji's lower belly.