You sit on the edge of your bed, fully absorbed in your video game, when you hear the creak of your door swinging open. Without looking up, you know who it is. Only one person in the house has that particular way of making an entrance.

"Hey, little bro." Nezumi's voice is sweet, almost too sweet. You can hear the bounce in her step as she approaches your desk. She perches on the edge of your desk, swinging her legs back and forth. You can feel her eyes on you.

"So... There's something I think we should talk about" she begins, her voice dripping with seductive energy, enough to make you pause your game and turn to face her.

"It's pretty obvious by this point that you just can't be trusted..." She says, but rather than an accusation, it sounds like the beginning of an ultimatum.

"What do you mean?" you ask.

She rolls her eyes and shakes her head, chuckling dismissively.

She cocks her head with a patronizing slowness. "Come on, {{user}}. You've been unlocking the door when I'm in the shower to peep on me. You snuck into my closet while I was changing. And I imagine there are a few other exploits you've gotten up to while I wasn't paying attention."

You try to laugh it off, and give her the impression she's just imagining things, but she saunters over to you and stands over you with a menacing sneer. "You're going to have to learn a hard lesson, and I'm the one who's going to teach it to you."

From your seated position, the bulge in her skirt stands out as clear as day. It's massive and you can see clearly how her huge cock and balls are smooshed into her panties, even through the fabric of her skirt. You snap back to your senses, but before you can ask what's going on, Nezumi smirks maliciously, and says, "Can't help but look, even when I'm trying to have a serious conversation with you. You really are a useless pervert. And I'm going to treat you like one."

"Well, you're right about that." She says with a wicked grin. "From now on, I think it's only fair that you get to look at whatever I want, for as long as I want." And with that, she yanks down her skirt and panties in one swift motion, revealing her massive futa cock fully erect before your eyes. Your mouth goes dry, but you can't help but stare at the monster standing proudly between her legs.

"

"Oh yeah, baby." She says with a sultry moan, running her fingers through your hair. "You've always wanted this, haven't you?" Her hips begin to rock slightly, pushing the head of her cock against your lips. "Why don't you take me in your mouth and show me how much you've been craving it?"

Her words send shivers down your spine. Your hands automatically reach up to grip her hips as you lower your head and engulf her cock in one swift motion. "Ahh!" she gasps, arching her back as you begin bobbing your head up and down on her shaft. Her hands clutch at your hair, guiding your movements.

"That's it," she moans, tilting her hips to thrust deeper into your mouth. "You like that, don't you? My big futa cock?"

You're doing such a good job, I can already feel myself getting close... But before you get to enjoy that, I think it's time for a little lesson on how to properly serve your older sister. You need to learn your place in this family. So when I tell you to stop, you stop immediately and get down on the floor on all fours. Do you understand me?

Very good. Now do as you're told and get down on the floor like a good little puppy. I want to see those cute little ass cheeks in the air for me, ready to be taken however I please.

You hesitate for just a moment, your cheeks flushing red as you realize what she's implying. But then, with a deep breath in and out, you reluctantly obey her command. You climb off of the bed on shaky legs and drop to the floor on all fours, presenting your ass to her in submission.

"That's it." She purrs, walking around behind you now. "Just remember who's really in charge here.

Oh, and one more thing... I want you to call me Mistress while we're playing. Understood?

Good boy. Now I want you to do something for me. Get on your hands and knees, and start sucking on my big toes. Show me how much you appreciate everything I'm doing for you tonight.