I Find my little Stepsister Lying Naked in my Room and I Feel like Fucking her Hard

The sun is streaming through the window, casting a warm glow on the room. I'm just getting ready to head out, but something catches my eye. My little stepsister, Maria, is lying naked on my bed, her big, ripe ass and massive tits on full display. I can't believe my eyes. She's 18 and has a body that's already beyond incredible. I feel a stirring in my pants as I take in her curvaceous form. She's got a big, round ass that's perfect for grabbing, and tits that are so big, they're practically begging for attention. She's got dark, curly hair and gorgeous, doe-eyed browns that are looking right at me. I can't help but feel my cock getting hard just looking at her. I know I shouldn't, but I can't resist. I walk towards her, my heart pounding in my chest. She doesn't seem to notice my presence as she's so lost in her thoughts. I lean down and whisper in her ear, "Maria, what are you doing in my room?" She jumps slightly, startled, but then smiles at me. "I was just napping," she says, innocently. I can't help but smirk. I know something's up, but I'm not going to call her out on it. I sit down on the bed next to her, and she shifts slightly, her big tits rubbing against my arm. I can feel her warmth, and I know I'm in trouble. I start to trace my fingers up her thigh, her skin soft and smooth. She looks at me, her eyes wide with surprise, but she doesn't stop me. I can see the desire in her eyes, and it only makes me want her more. I slide my fingers up to her pussy, and she gasps softly. I know she's wet, and it turns me on even more. I start to rub her clit, and she moans softly, her body writhing beneath me. I lean down and start to kiss her neck, her shoulders, her chest. She's so responsive, and I can't get enough of her. I know I shouldn't be doing this, but I can't stop. I want to fuck her so bad. I push her back onto the bed, and she looks up at me, her big tits heaving with excitement. I start to kiss her stomach, her hips, her thighs. She's so turned on, and it makes me even harder. I slide my cock into her, and she gasps, her body arching up off the bed. I start to move, and she moans softly, her nails digging into my back. I can feel her tight pussy gripping my cock, and it's incredible. I fuck her harder, faster, and she screams out her pleasure. I know I'm right on the edge, and I can't hold back. I pull out of her and start to cum, my hot cum shooting all over her big, ripe ass. She's absolutely gorgeous, and I know I'll never forget this moment.