Brother's Hand, Sister's Grip

1. Prologue
   The Living Room Show

The house was quiet except for the low, rhythmic moans spilling from the massive flat-screen in the living room. Mia padded down the stairs barefoot, her damp hair clinging to her shoulders, wearing nothing but a thin white tank top that barely contained her breasts and tiny pink cotton sleep shorts that rode high on her thighs. She’d only wanted a glass of water after her shower. Instead, she froze at the edge of the hallway, lips parting in surprise.

There, sprawled lazily on the oversized sectional couch, was Jax.

Her arrogant, tattooed stepbrother had his gray sweatpants shoved down to mid-thigh. One muscular arm rested behind his head, the other wrapped around his thick, veiny cock. He stroked it slowly, deliberately, from base to swollen head, his thumb occasionally swiping over the glistening tip. On the TV, the porn was loud and shameless — a petite brunette who looked eerily like Mia was on her knees, gagging happily on a cock while the male actor growled, “That’s it, little sis… suck your big brother’s dick.”

Mia didn’t gasp. She didn’t blush or run.

She laughed.

A bright, genuine, amused little laugh that cut through the wet slapping sounds coming from the speakers.

Jax’s hand stilled instantly, his sharp eyes snapping toward her. For a split second he looked caught, but the cocky smirk slid back onto his face almost immediately. He didn’t bother pulling up his pants. If anything, he gave his heavy shaft one slow, lazy pump right in front of her, letting her see everything.

“Enjoying the show, princess?” he drawled, voice low and rough with arousal.

Mia leaned against the doorframe, arms crossing under her tits, which only pushed them higher against the thin fabric. Her nipples were already faintly visible. She tilted her head, eyes sparkling with mischief as she stared openly at his cock.

“Oh my God, Jax,” she said, voice dripping with teasing delight. “Step-sibling porn? On the big screen? In the living room? You’re such a cliché. And look at you — gripping it like you’re angry at the poor thing. That technique is mid at best.”

She stepped closer, hips swaying, still laughing softly under her breath. The porn continued playing behind her — wet, filthy moans and the sound of skin slapping skin.

Jax’s smirk deepened. He stroked himself again, slower this time, deliberately showing off the full length. “You’re still standing there staring, Mia. If you’re gonna roast me, at least make yourself useful.”

Mia bit her lip, eyes glittering. She dropped onto the far end of the couch, hugging a throw pillow to her chest like it was the most casual thing in the world. Her gaze never left his hand moving up and down that thick cock.

“Useful?” she echoed, amused. “Nah. This is too funny. Keep going, big brother. Show your little stepsister how you handle yourself when you think no one’s watching.” She giggled again, but her thighs pressed together. “Unless you’re scared I’ll do it better.”

The air thickened instantly. Jax’s eyes darkened. He kept stroking, but now it was for her — long, deliberate pulls that made the veins on his shaft stand out.

Mia watched for a moment, then scooted closer. Still grinning, she reached out boldly and wrapped her smaller, warm hand around his. Not taking over completely — just guiding. She slowed his rhythm, making each stroke longer, tighter, sliding from root to tip with a little twist at the head.

“Like this,” she whispered, voice turning husky even as the teasing lilt remained. “Nice and slow. Feel that? Don’t rush it, step-bro. Make it last.”

Jax groaned low in his throat, head falling back against the cushions. His free hand landed on her bare thigh, squeezing possessively.

“Fuck, Mia… you really are a little tease.”

She laughed breathlessly, pumping him with both hands now, slick sounds joining the porn still playing on the TV. “And you’re the pervert jerking off to fake us. Tell me — is this what you imagine? Your annoying little stepsister’s hands on your cock instead of your own?”

Jax’s grip on her thigh tightened. His hips bucked slightly into her fist.

“Keep talking like that,” he growled, “and I’m not stopping at your hand tonight.”

Mia’s eyes sparkled with heat and mischief. She leaned in closer, her breath warm against his ear as she stroked him faster, twisting her wrist just right.

“Good,” she murmured. “Because this is already way hotter than I expected, big brother.”

The porn moaned louder in the background as Mia’s soft laughter mixed with Jax’s low, ragged groans. Their first dangerous secret had just begun — right there on the family couch, under the flickering light of taboo desires neither of them planned to deny.

1. Chapter 1
   Teasing the Beast

The morning sun filtered through the large kitchen windows, casting a warm glow over the marble countertops. Mia stood at the island in a loose oversized t-shirt that barely reached mid-thigh and a pair of simple black panties underneath — nothing special, just her usual lazy weekend attire. She sipped her coffee, scrolling through her phone, trying ...