I crept into my brother's room at 2 a.m. knowing exactly what I wanted. He lay on his back, dead asleep after a long day, the sheet kicked down to his thighs. His cock rested thick and soft against his leg, half-hard from some dream. My mouth watered instantly. I eased onto the bed, careful not to wake him, and wrapped my fingers around the warm shaft. It twitched once, then started to swell in my hand.
I leaned down and dragged my tongue from the base to the head, slow and wet. He tasted clean, a little salty. I licked again, firmer this time, circling the crown until it glistened. His cock kept growing, stiffening against my lips until it stood up heavy and ready. I opened wide and slid the head into my mouth, sucking softly at first, just the tip, letting my tongue press against the underside.
He didn't stir. I took more, inch by inch, until my lips met my fist at the root. I bobbed my head, cheeks hollowing, spit running down his balls. Every time I pulled up I sucked harder, making a wet, obscene sound that filled the quiet room. His hips shifted once, a sleepy thrust that pushed his cock deeper into my throat.

I gagged quietly but didn't stop. I wanted all of it.
I let go of the base and used both hands to spread my spit everywhere, stroking him while I sucked the head in quick, tight pulls. My own pussy throbbed, slick between my thighs, but I ignored it. This was about him, about seeing how far I could push it while he stayed asleep. I took him to the back of my throat again and held there, swallowing around the thickness until my eyes watered. When I came up for air, strings of saliva connected my lips to his glistening cock.
He moaned low in his sleep, a rough sound that made my clit pulse. I doubled down, sucking faster, one hand pumping the shaft while the other cupped his balls, rolling them gently. His breathing changed, grew heavier. I could feel him getting close, the head swelling even more on my tongue. I didn't slow down. I wanted him to come in my mouth without ever opening his eyes.
His cock jerked hard. The first spurt hit the back of my throat, thick and hot. I kept sucking, milking every pulse, swallowing as much as I could while the rest leaked from the corner of my mouth and down his shaft. He groaned again, hips bucking once, twice, feeding me the rest. I licked him clean after, slow and thorough, until he started to soften against my tongue.
I sat back on my heels, wiped my chin with the back of my hand, and watched his chest rise and fall. Still asleep. I slipped off the bed, licked my lips one last time, and left the room with the taste of him still on my tongue.