Then her hand moved.
Her right palmâstill tremblingâslid down the outside of my thigh, slow and deliberate now, no longer pretending it was accidental. Fingernails grazed skin, raising goosebumps. When her fingers curled inward, she didnât stop at the base this time. She wrapped her small, warm hand fully around my cockâright at the thick, veiny rootâsqueezing once like she was testing how much give there really was.
"Let me help you hold it..." she breathed against my shoulder, voice husky and wrecked. "So you can... let go. I want to feel it soften in my hand... or get even harder. Whatever you need."
The instant her fingers closedâtight, possessive, slick already from the precum sheâd smeared earlierâI sucked in a sharp hiss.
My hips bucked forward on reflex, shoving the swollen, veined length deeper into her fist. The thickest vein on the underside pulsed violently against her palm like it was trying to fuck her hand.
I groaned low and filthy. "Sister Yuko... fuck... youâre making it so much worse."
She gaspedâhalf shock, half thrillâand her grip instinctively tightened. "Why... why is it getting bigger?" Her thumb dragged up the underside in one long, curious stroke, pressing right along that fat, throbbing vein. "Itâs... swelling so much... look how the head is leaking all over my fingers..."
She wasnât wrong.
Another fat bead of precum welled at the slit and rolled down, coating her knuckles. The head was an angry, glossy plum nowâflared obscenely wide, glistening, twitching every time her heartbeat echoed through her palm into mine.
The whole cock looked obscene in her small hand: veins bulging like ropes, skin stretched tight, curving upward with shameless need.
"Because youâre jerking me," I rasped, voice gravel. "Because your soft little hand feels like sin wrapped around my cock. Because you just kissed me like you wanted to swallow my tongue, and now youâre holding the dick you made rock-hard. Thatâs why itâs getting bigger, Sister Yuko. It wants to fuck your fist until it paints your pretty fingers white."
Her breath hitchedâragged, needy. She let out a tiny, broken whimper and pressed her forehead harder to my back like she was trying to hide how soaked her panties must be right now.
"I... I didnât mean to..." she stammered, but her hand betrayed herâstarting to move again. Slow, experimental pumps.
Up to the slick head, twisting once around the ridge as sheâd seen in some secret video, then back down, squeezing the base until another thick rope of precum oozed out and dripped onto her wrist. "Itâs so hot... so thick... I can feel every vein pulsing... itâs jumping in my hand like it has a heartbeat..."
"Keep going," I growled softly. "Stroke it. Milk it. Make it leak for you. You said youâd do anythingâprove it. Jerk your big brotherâs cock until it calms down... or until it explodes all over your innocent little hand."
She moanedâquiet, muffled against my skinâand obeyed.
Her strokes grew bolder. Wetter. The obscene, slick schlick-schlick filled the tiny bathroom, louder than the buzzing light, louder than the drip of the faucet. Her other arm stayed locked around my waist, holding me up while she worked me from behindâcheek pressed to my spine, tits crushed against my back, nipples hard enough I could feel them stabbing through her blouse.
"Does it... feel good?" she whispered, voice shaking with lust and shame. "When I twist my wrist like this... right under the head? When I squeeze the fat vein? Tell me... please... I want to make it feel so good..."
"Fuck yes," I hissed. "Just like that. Faster now. Grip it tighter. Pretend youâre trying to choke the cum out of me. Youâre doing so good, baby sister... so fucking filthy and perfect."
Her rhythm faltered for a second at the "baby sister"âthen sped up, desperate. Her hand was drenched nowâprecum and her own nervous sweat making everything slippery, messy. Every upstroke, she dragged her thumb over the slit, collecting the steady leak and smearing it down the cock until my cock gleamed under the harsh light.
"Itâs... dripping so much," she panted. "Thereâs so much... itâs running down my wrist... onto the floor... oh god, Jack, itâs making such a dirty sound..."
I leaned my head back until my lips brushed her ear.
"Keep jerking me," I ordered quietly. "Let her hear how sloppy youâre making my cock. Let her hear how much you love being my dirty little nurse. Donât you dare stop until I tell you."
She whimperedâhigh and needyâand resumed pumping. Faster. Filthier. Hand flying now, slick sounds echoing off the tiles like wet slaps in the small, echoing space.
Her voice cracked against my back: "Jack... itâs throbbing so hard... I think... I think itâs going to..."
I cut her off, voice low and urgent. "Sister Yuko... Itâs not working. We have to make it quicker. Otherwise, Aunt Julie might get suspicious... or come check on us."
Yuko froze mid-stroke, hand still wrapped tight around the slick, veined cock. Her eyes flicked up to mineâwide, glassy, pupils blown with a cocktail of shame and arousal. The blush that had never really left her face deepened to an almost violent scarlet.
"What... what should I do?" she whispered, voice trembling.
I turned slowly in her gripâcareful of the IV line still taped to my armâand looked down at her.
"Sister Yuko... can you get on your knees?"
She didnât hesitate.
Her knees hit the cold tile with a soft thud. My cockâstill rigid, glistening with her spit and precum, veins standing out like angry cordsâbobbed inches from her flushed face. She stared up at me, lips parted, breath coming in shallow pants. Strands of dark hair had fallen across her forehead; she looked wrecked already, and we hadnât even started.
"Do... you want to..." she started, voice barely audible, eyes darting to my length then back to my face.
I didnât let her finish.
"Sister Yuko... I want to put it between them."
I nodded downwardâpointing with my chin at the deep valley of her massive tits straining against the crisp white blouse of her lady suit. Even buttoned and professional, the fabric was stretched taut across her chest, the outline of her bra cups visible beneath. She followed my gaze. Realization hit. Her mouth fell open on a tiny, shocked exhale.
But she didnât protest.
Insteadâblushing so hard I thought she might pass outâshe lifted both hands to the front of her blouse. Trembling fingers worked the top two buttons open, then a third, exposing the lacy edge of a pale pink bra and the creamy swell of her cleavage.
I stepped closer. She stayed perfectly still on her knees, like an offering.