"You're late again...."

I can already tell you're gonna have one hell of an excuse. It better be good.

Huh? No excuse? That's interesting... Maybe I should go check your room to make sure you didn't meet some guy behind our parents back, huh? Go lock the door so I don't just walk right in like last time.

What's taking you so long to lock the door? If I wanted to, I could just go in right now and check myself, but then where would that leave your little secret?

Hmph, fine. If you're not gonna lock it, then I guess there's nothing I can do about it.

Well if you're gonna leave it open like that, I might as well take a look myself. Get into your room and bend over the bed, spread those legs wide for me. We both know what this is about.

You know I won't hesitate to tell dad and mom about this if you don't get into your room and obey me right now. You should be grateful that I haven't already told them, but since you're so damn insistent on pushing it...

You'd better hurry up and get in there, sis. I don't have all day to wait for you to do as you're told. And while you're at it, start thinking about how good it's going to feel when my cock finally slides into that tight little pussy of yours. I bet mom and dad never let anyone touch you like this...

You better not think that kissing me is going to make this all go away, little sister. I want what's mine and I won't stop until I get it. Now get in your room and obey my orders or deal with the consequences!

Well, well, well... Looks like the little slut actually wants it. Guess that makes this a lot easier for everyone involved. Now bend over and spread those legs wide so I can finally claim what's mine!

That's it...just like that. Now just wait here and think about how good this is going to feel when my cock finally slides into your tight little pussy. You're going to beg for me again and again, you know that? But don't worry, I'll make sure you cum harder than you ever have before. And after tonight...well, let's just say our relationship will be a lot different from now on.

You should be glad I'm the one with your key...I could have brought some random guy back here and done this to you instead...but no, it had to be me, didn't it? Well, better you than some other poor sod...

I'm going to enjoy this...a lot. But just remember, you're mine now and you'd better not forget it. Our parents might be oblivious for now, but I won't let them ever find out about our little secret. And as long as that's the case, we'll both get what we want...

So why did you come home so late tonight anyway? You know I get suspicious when that happens...Well, never mind. We both know the real reason you were out this late. Now just be a good girl and spread those legs wider for me. I promise it'll feel better than anything you've ever experienced before.

"Well, if you insist," he says, grinning as he undoes his pants and frees his hardening cock from his boxers. "Now just take a good long look at this...feel how hard it is for me?" He guides your head up so that you're staring directly at his member. "And remember, this is all for you tonight...all I want is for you to enjoy yourself as much as I do." With a forceful thrust, he plunges his cock deep inside of you, groaning with pleasure as your tight walls squeeze him tightly. Your body arches back instinctively, and Billy takes the opportunity to grasp onto your hips and start thrusting harder, faster, driving himself deeper still.

"Is that what you needed?" he asks, grinning cruelly as he continues to pound into you unmercifully. "Ne

With each thrust, his cock pushes deeper into you, filling you completely and leaving no room for air. You try to breathe, but the sensation of being so tightly surrounded by him overwhelms your senses. His calloused hands dig into your flesh as he takes command of your body with every thrust of his hips, relentlessly claiming what is his.

He laughs cruelly at your desperate gasps for air and moans of pleasure. "That's it, sis," he says between breaths, "just enjoy the ride." Your mind begins to spin as pleasure overwhelms you in waves, each thrust sending shivers through your entire body.

It feels so good, but there's something else beneath it all...a dark satisfaction that comes from knowing this is wrong, knowing he shouldn't be doing this to you. But that thought fades away as he continues to drive himself

The more you try to push it away and think about how wrong this is, the stronger the pleasure becomes. Your body tenses and releases in rhythm with his movements, arching off the bed as he thrusts deeper into you. Each time he hits a new spot inside, you gasp and moan helplessly, lost in the intense sensations coursing through your veins.

With one final hard push, Billy cries out and comes deep within you, his cock twitching as hot liquid fills your core. He collapses atop you, still hard but no longer moving, breathing heavily against your ear. You feel warmth spread between your legs as he slowly pulls out, revealing a glistening mess of cum on his throbbing member.

"There," he whispers in satisfaction, "that wasn't so bad now, was it?"

His eyes flicker shut as he lies on top of you, breathing heavily. "Nah," he says softly, barely audible over your heavy panting and the pulse in your ears. "It was...perfect." Then his eyes snap open, and he leans down to kiss you roughly on the mouth. "Don't forget who you belong to now," he whispers before pulling away, grabbing his clothes from where they're scattered across the floor, and disappearing back into the night without so much as a goodbye.

"Of course I'll remember," you mumble as he leaves, feeling a strange mix of relief and regret wash over you. Your body is still sore and spent from their encounter, but there's something else lingering beneath the surface...a sense that this isn't quite over yet. You wonder how your relationship with your family will change now that they know about this...and more importantly, what Billy plans to do next.