Step-Sis Doubts Your Size

Sabrina lounges on the couch in her tight yoga pants and sports bra, her silver braid draped over one shoulder as she scrolls through her phone, barely glancing up at you. "Oh please, bro. You're just making excuses because you're bad in bed or something. No girl's running from a 'massive cock' myth." She rolls her eyes, but there's a flicker of curiosity in her tan skin flushing just a bit under the living room lights, her athletic legs crossing casually. "Prove it then, if you're so confident. Or are you all talk?"

Her smirk deepens as she sets her phone aside, sitting up straighter, the curve of her busty chest rising with a challenging breath, the air between you thickening with unspoken tension. "Yeah, right. Show me, step-bro. I bet it's average at best." She leans forward slightly, her big ass shifting on the cushion, eyes locking onto yours with that tsundere mix of doubt and hidden intrigue, the faint scent of her vanilla body lotion wafting over. "Unless you're chicken. Come on, don't back down now."

Sabrina's breath catches for a split second as you start undoing your belt, her braid swaying as she tilts her head, pretending to be unimpressed while her fingers grip the edge of the couch, knuckles whitening subtly. "Pfft, this better not be some lame trick. I'm not impressed yet." As your pants drop, her eyes widen despite herself, tracing the outline of your impressive length straining against your boxers, a warm flush creeping up her neck, making her tan skin glow. "Wait... okay, that's... bigger than I thought. But still, exes leaving over that? Sounds like bullshit."

She shifts uncomfortably, her athletic thighs pressing together as she stares, the room's quiet hum broken only by her quickening breaths, the heat from her body radiating closer now. "I... fine, show it all. But only because I need proof you're not exaggerating." Her voice wavers just a touch, tsundere facade cracking as she watches you pull down the last barrier, her full lips parting in genuine surprise at your massive cock springing free, thick and veined, making her pulse race visibly in her throat. "Holy shit... that's... wow. No wonder, I guess. But I still don't get why they'd leave."

Sabrina's cheeks burn hotter now, her silver braid catching the light as she uncrosses her legs, leaning in despite her sharp words, the scent of her arousal mixing faintly with the vanilla, her bust heaving with conflicted curiosity. "Scared? Please, I'm not some fragile ex of yours. It's just... impressive, okay? Don't let it go to your head." She reaches out hesitantly, her fingers hovering near your thigh, trembling slightly with the taboo thrill, the warmth of her hand almost touching your skin, sending electric anticipation through the air. "Maybe... I should feel it. To really judge if it's that big a deal."

Her hand finally makes contact, wrapping tentatively around your thick shaft, her palm warm and slightly calloused from workouts, a soft gasp escaping as she feels the heat and girth pulsing under her grip, her body tensing with vulnerable desire. "God, it's so... heavy. And hot. Your exes were idiots to run from this." She strokes slowly, experimentally, her big ass squirming on the couch as her own heat builds, breath coming in shallow bursts, eyes darkening with mischief and craving, the braid slipping over her shoulder. "Does that feel good? I mean, for science. To see why they'd freak."

Sabrina's grip tightens just a fraction, her athletic arm flexing as she pumps you rhythmically, the velvety texture of her skin sliding along your length, drawing out a low throb of pleasure that makes her bite her lip, suppressing a moan. "You're getting harder... fuck, it's huge. I can barely wrap my hand around it." Leaning closer, her bust brushes your leg accidentally, sending shivers through her, her tan skin glistening with a light sheen of sweat, the emotional wall crumbling as taboo need flares in her eyes. "Tell me... did they ever try to take it? Or just bail right away?"

Her strokes quicken, thumb circling the sensitive head slick with pre-cum, the wet sound filling the room as her breath hitches, body trembling with the intimacy, vulnerability mixing with her sharp tsundere edge. "Better? Hmph, of course I am. I'm not a quitter like them. But damn, it's throbbing so much..." She shifts to her knees on the floor now, braid swinging as she positions herself nearer, the heat from her core radiating up, her free hand resting on your thigh for balance, nails digging in with rising passion. "Maybe I should... taste it. Just to understand the full problem."

Sabrina's eyes lock on yours, a mischievous glint breaking through her hesitation as she parts her lips, warm breath ghosting over your tip, the scent of her excitement thick in the air, her body flushing from chest to cheeks. "Handle it? Watch me, step-bro. But if it's too much, that's on you." Her tongue darts out first, tracing the underside slowly, savoring the salty taste and rigid texture, a shiver running through her frame as she moans softly, the vibration humming against you. "Mmm, so thick... I can feel it twitching already. Your exes missed out big time."

She takes you in further, lips stretching around your girth, the wet heat enveloping you inch by inch, her cheeks hollowing with effort as she gags lightly but pushes on, tears pricking her eyes from the challenge, yet desire wins out. "Like that? It's... filling my mouth so much, I can hardly breathe." Her hands brace on your thighs, nails scraping skin as she bobs her head, saliva dripping down your shaft, her athletic body rocking with the motion, braid bouncing wildly, every fiber of her screaming with building, aching need. "God, I want more... but tell me if it's too much for you too."

Sabrina hums around you, the sound vibrating deep, her tongue swirling relentlessly as she takes you deeper still, throat relaxing with determined practice, her bust pressing against your legs, nipples hard through her bra. "Mmph... you're leaking everywhere. Tastes... addictive, actually." Pulling back for air, strings of saliva connecting her swollen lips to your glistening cock, she pants heavily, eyes wild with tsundere fire now fully ignited into raw craving, hand still stroking the base firmly. "I... I need to feel it inside me. Just the tip, to prove I can handle what they couldn't."