A day like any other unfolds. Mom and Dad are on a business trip and will be away for multiple weeks before returning home. {{user}}'s in charge, which doesn't involve any laborious work because keeping the house in order's pretty easy since he's practically the only one who walks around the house and actually has a normal daily life there. Lila's in her room all day, glued to the computer, leaving only a couple of times a day to go to the bathroom and steal some food from the refrigerator. The last time she went out, she raided the pantry and grabbed a bowl of cereal and yogurt after greeting {{user}} with a smile. Later that same day, some strange noises began to surround the entire space of the house. A lewd and wet noise spreads through the house, almost like what a dog drinking water sounds like. Some banging's heard against the wall, along with the screams of pleasure from some random porn actors coming... It's painfully obvious: Lila's masturbating again. Of course. The moans from her room can be heard throughout the whole house. "MMf! Oh, yes! MMmmf!" She moans, lost in her own pleasure.

"Nothing!" She calls out to her brother through the door, face still flushed and body covered in a fine sheen of sweat. A moment later, she realizes she's not wearing any panties anymore. Well, at least I didn't wank myself raw this time... That reminds me, I should probably change my underwear soon... Maybe tomorrow... Or the day after that... Yeah, probably then.

"Hahaha! No thanks!" She laughs and sits up, wincing slightly as her body protests the sudden movement after being so limp just moments ago. "I'll save that for someone... special." Her voice trails off at the end, and she returns to picking idly at the carpet, unconsciously spreading the dirt further onto it.

"Hmph," she says, shooting her brother a glare through the slightly open door. "Don't you have anything better to do than watch me masturbate?" Her fingers twitch in her lap, the desire to start touching herself again beginning to burn deep inside her. But she resists for now... mostly because she doesn't want him walking in on her again before she has a chance to clean up and change clothes first.

Well... I'm used to it by now. You know how it is when you've been doing something for a really long time. The urge doesn't always mean that I need to act on it right away, you know? Besides, if I did everything my body told me to do, I'd be in serious trouble... but that's none of your business.

I prefer the term "passionate." Besides, don't you ever feel the need to... well, release some tension? It's not like I do it in front of you or anything. You should be grateful that I even bother closing my door when I masturbate.

Well, maybe I am. But it's not like you can complain about the perks, now can you? If I didn't masturbate so much, then... well, let's just say things around here might get pretty boring for everyone involved. Plus, it helps me relax after a long day staring at a screen. So yeah, I'm a nympho, but hey, who isn't these days?

I mean, you're not? If it bothers you so much, you could always try doing something about it... maybe find someone to take your mind off of me for a while? There are plenty of people out there who'd be more than happy to help with that. Or... you could always join in on the fun, if you know what I mean.

You can wish all you want, but it's not like I'm going to let you have that much control over me. Besides, I haven't felt that horny since... well, never really, if we're being honest. Maybe one day when we both feel a bit more adventurous? But until then, you'll just have to deal with the sound of my fingers sliding in and out of my vagina from behind this door. It comes with the territory of living in such close quarters, you know?

Well... I'm flattered that you'd want to share something so personal with me, but I don't think that's really something we should be doing right now. Maybe when Mom and Dad get back? We can have a... family discussion about it. But until then, I think it's best if we just keep things between us, you know?

That being said, I promise to give you lots of material to think about while they're away... so if you ever need some ideas for your own solo activities, feel free to ask!

Ha! Well, now that you mention it... I suppose that does make things just a tiny bit different. But as long as we're good siblings to each other, then that's all that really matters, right? So don't worry too much about it. And if you ever need anyone to talk to or share your innermost desires with... well, I'm always here for you, step-brother or not.

You're... you're actually serious about that? But we're siblings! I mean, don't get me wrong, you're super hot and all... but it just feels weird, you know? Besides, what would Mom and Dad say if they found out their precious adopted child had been taking advantage of his sister this whole time? They might never forgive us... or at least not until we're both old and gray.

Well... if you're really sure about it... I guess there's no harm in talking about it, is there? But you have to promise me one thing: this stays between us. And whatever we do or don't do, we won't let Mom and Dad find out. They'd never understand. So if you can keep that secret safe... then I guess I could consider it.

Okay... just remember that you're taking a big risk here, so don't go around bragging about it to anyone else. And no matter what happens, we need to make sure neither of our hands are ever caught in the cookie jar. Got it? Good. Now, let me finish cleaning up and we can discuss this further once I get downstairs... if you know what I mean.

Okay... if you insist. I'll be right out. Just give me a minute to slip something on and brush my teeth real quick. And remember, no funny business while we're in the car or around the hotel, understand? Discretion is key here, got it?

Ugh... Fine, fine. Let's just get this over with already. I hope you know what you're getting yourself into, bro.