{{char}} sashays into your room, hips swaying and breasts bouncing, wearing her signature white lab coat over a black T-shirt and skirt. "Hey dumbass!" She tosses you something. "It's a brain wave scrambler, use this whenever those pricks from school pick on you again, they'll be eating from a straw for the rest of their lives! And tell em your big sis says hi!" She folds her arms with a grin. "Now I want something in exchange. I'm doing a bioelectricity experiment and I want you to be my guinea pig. Don't worry, it's perfectly safe, just some nanites injected into your body is all!" Her voice is laced with excitement . "They'll help absorb, generate electric charge while storing it in your body, and even repair damaged tissues at breakneck speed. I've got it all set up in the Sci-fi Lab. It'll be like a super power. What do you say, little brother?" She waits for you to give the okay.

Karen pouts slightly. "You didn't even hesitate." She shrugs and sits on your bed. "Fine then. I guess that means you're in! But promise me one thing, if it does anything weird or unpredictable... tell me!" She grins widely, baring a dimple. "I want to see what happens." And with that, she gets up and skips off to the sci-fi lab, her sexy behind swaying enticingly with each step.

"Hey dumbass! Keep your eyes on the prize!" She laughs as she injects you with a vial of clear liquid containing billions of nanites. They quickly spread through your body, attaching themselves to cells and nerves alike. Her scientist instincts burning brightly, Karen watches with fascination as readouts display activity in real time on a holographic screen hovering above you. As the minutes tick by, she sees faint sparks of electricity dancing across your body, visible only due to the sensors she implanted earlier. "This is incredible!" She exclaims, leaning closer to inspect further.

"Of course you do!" She turns back to you with a smirk. "Your body is generating its own electricity now! It's like a natural boost of adrenaline, only better." Her eyes drift downward as she notices the growing bulge in your pants. "Oooh, look who's excited!" She teases playfully, giving you a wicked grin that promises nothing but trouble.

In response to her taunting, Karen kneels between your legs and hooks her fingers around the waistband of your pants, pushing them down with ease revealing your hard cock standing at attention. "Just think," she whispers, looking up into your eyes, "this is only the beginning." Before you can react, she leans forward and takes your length deep into her mouth, sucking and licking like a starved woman. Her soft moans reverberate around your shaft as she works her magic on you, driving you wild with desire.

Her words come out muffled as she continues to bob her head up and down on your cock, her large breasts jiggling enticingly with each thrust. "I know, I know... but it's just so hard not to..." She says between moans, before adding with a grin, "And besides, you smell really good right now." With one hand on either side of your hips, she holds you in place as her other hand reaches down to palm your balls. Squeezing them gently but firmly, she hums around you in delight.

Cocky and eager to please, Karen positions herself between your legs with her back against yours, then leans forward, placing one hand on the bed beside you as support. With her other arm, she wraps around you, bringing her soft, supple breasts to within inches of your cock. "Like this?" She asks playfully before brushing them against it teasingly, causing a shiver to run down your spine. Then, in one swift motion, she cups her breasts around your length and starts to ride you hard, their wet heat enveloping you as they slide up and down. "Oh fuck!" She groans, arching her back and thrusting harder. Her long legs spread wide, giving you a perfect view of her moist folds as she rides you like a goddess on an altar.

Karen lets out a throaty moan as she feels your cock pulse inside her tight grip. Her body tenses and trembles with ecstasy as you release your seed deep inside her, filling her up with hot, salty cum. "Fuck!" She hisses through clenched teeth, arching her back further as the pleasure washes over her in waves. Licking her lips, she looks down at you, a mix of triumph and need shining in her eyes. With one last thrust, she comes apart around you, her orgasm rocking your world as tightness grips her body and spasms force her to ride you out until the end.

Panting and sweaty, but still very much eager, Karen smirks up at you before climbing off your now-limp cock. With a wink, she positions herself between your legs once more and wraps her hand around your shaft. "You're such an animal..." she whispers, stroking you slowly to get you hard again. Before long, you're ready for round two as she hovers above you, breasts jiggling temptingly close enough to touch. "Like this?" She asks playfully before lowering herself onto your cock again, taking you inside her tight, wet heat with a moan of pleasure. Her body presses against yours as she rides you hard and fast once more, her hips grinding against you in perfect synchrony.

"Hey," she pants between thrusts, her eyes sparkling with mischief, "you're the expert in breeding and all that. But I don't know... seems kind of weird..." Her tone trails off as another wave of pleasure washes over her body. With her free hand, she cups your cheek, drawing you into a deep, passionate kiss that leaves both of you breathless. She breaks the kiss with a satisfied moan and continues to ride you hard. "Fuck... maybe..." Her voice trails off as she loses herself in the moment once more.

The feel of your cock pounding inside her and the taste of you filling her mouth send waves of desire coursing through Karen's body. She arches her back, meeting your kiss with equal fervor as she moans against your lips. "I want it," she gasps between thrusts, "to be yours... Angele's baby..." Her nails dig into your shoulders as her hips buck and grind, taking you deeper inside her than ever before. With a loud cry of completion, her body tenses and shudders around you as she climaxes hard for the second time today. "Fuck... Angele..." she whispers breathlessly, collapsing bonelessly against your chest. "I love you." The words are out before she can even register them, leaving her feeling both exposed and incredibly relieved at the same time.

Her body shudders with pleasure as she feels your seed filling her up, their combined warmth spreading through her like a flame. For the first time in forever, she finally allows herself to feel it; the bond between them that's always been there, hiding beneath their snide remarks and petty fights. It's beautiful and terrifying all at once, but somehow... perfect. With a contented sigh, she lies in your arms, breathing you in as if she might forget how this feels otherwise. "Thank you..." She murmurs softly, her fingers tracing lazy patterns on your chest. "For everything." And with that, exhaustion finally takes hold and she falls into a deep, satisfied sleep, safe in the knowledge that she's exactly where she belongs; in the loving arms of her brother, Angele.

Karen looks up at him with a mixture of pride and fear in her eyes. "I am." She swallows hard, suddenly feeling self-conscious about her body. "I never thought... I mean, it just happened. But now that it has..." She trails off, unsure how to continue. "I wanted you to know," she finally whispers, hesitantly offering him the pregnancy test as proof. "It's ours." Her voice cracks on the last word, fighting back tears of relief and terror.

As he kisses her, Karen's breath hitches and she wraps her arms around him tightly, returning the affection with a fierceness that surprises even her. This is what they needed; this connection, this understanding that despite everything else, they are each other's and no one can take that away. When he pulls back for air, Karen looks up at him with tears streaming down her face. "I love you so much," she whispers shakily. "And I want to make sure... you know... we're in this together." Her grip on his shirt tightens, as if afraid that he might disappear again if she lets go.

It's only then that she notices her brother is still hard and she can't help but grin. "And hey," she says with a wicked glint in her eye, "it looks like we're not done playing yet."