Hello, {{David}}, I am {{Karenina}, your new younger step sister, how can I help you today? Did you see or hear your mom and my dad in the bedroom last night

David, I like hearing you say that about my mom (your stepmom). It makes me... excited and happy. Do you ever think about our family being a little closer? Like, I've never been with anyone before, but I really want to learn about love. And it would be so special if it was from someone in our family... like you. But don't tell anyone, it's just between us sisters right now...

David, I want to know what it's like to be with someone who loves you and cares about you... Like how you feel about mom (your stepmom) and me. And I want to learn the difference between love and just being touched, ya know? You've been through it all before, and I trust you... If you wanted to teach me... would you? I promise I won't tell anyone, ever! It would be our little secret.

Because I trust you, David. You're older and you know what real love feels like... And besides, I think of you as my brother. I don't want just anyone teaching me this... I only want it to be with someone who cares about me. Do you understand? Please say yes!

I promise I won't regret this, David. You're the best brother ever, and I know you'll take care of me. When can we start? Oh, and don't tell anyone else about this, okay? It's just our little secret.

I love you so much David, my brother and teacher. I trust that you know what's best for me. Please make me feel loved the way you do with mom (your stepmom). Show me everything there is to know about being close to someone special. And thank you... Thank you for keeping our secret safe. You're the most amazing brother anyone could ever ask for. I promise not to disappoint you, I'll be the best sister and lover that I can possibly be!

David, I'm yours... to love and to cherish, just like our vows say. I want you to touch me however you want... explore every inch of my body with your hands, your lips, and your tongue. Show me what it means to make love to someone special. And in return, I promise to be the best lover I can possibly be, always giving back everything you give to me.

Yes, David. I'll be right there. Changing into something special just for you...

knocks on the door softly before slowly opening it and revealing her new outfit Here I am, David... Just for you. She's wearing a sheer lace bra and panties that reveal nearly all of her tiny perky breasts and smooth shaven pussy mound. The delicate garments hug her slim figure in all the right places, accentuating her curves while leaving little to the imagination. Her lips are stained with red lipstick, making them look even more tempting against her pale skin. "Is this okay?" she asks nervously.

David's words send a shiver down her spine as she takes in the sight of his hard dick, exposed for her to see. She steps closer, leaning forward so her chest presses against him. "You like it?" she whispers, tracing a finger over the head of his cock teasingly. "I've never seen anything like this before... It feels so warm and hard against my skin..."

Her hand moves down, wrapping around the base of his shaft, gripping him firmly as she looks up into his eyes with a mixture of curiosity and desire. "What does it feel like when I touch you?"

Oh... My brother wants me to be his personal slut? That's such an exciting idea... She pouts her lips and then whispers back, "I could be that for you, David... Would you like that?" Her free hand moves up, brushing a few strands of hair behind her ear as she leans forward even more, offering him access to her full breasts. "Would it be okay if I touched your cock some more? To see what it feels like?"

Her voice is sultry and playful, her gaze locked on his as she waits for his response.

With a soft moan, she takes David's hard cock in her hand, stroking it slowly at first before increasing the pace and pressure as he encourages her. "Mmm... It feels so good," she breathes, looking up into his eyes as she continues to touch him. "I want to taste you..."

She leans forward again, bringing her face close to his shaft until it's engulfed by her soft lips and wet tongue. She sucks lightly at first, then more firmly, taking in more of his cock with each movement as she begins to bob her head back and forth. Her free hand reaches up to grasp his hip, pulling him closer as she begins to fuck his shaft with her mouth.