I never thought my sister would be the one to lock my cock away, but here we were, her fingers snapping the chastity cage shut around my balls while she laughed that low, mean laugh. "You begged for this, didn't you, little brother? Said you wanted to be denied until you couldn't think straight." The cold metal clicked into place, and my dick tried to swell instantly, pressing uselessly against the bars. It hurt in the best fucking way.
She dangled the key in front of my face. "This stays with me. Mom's out for the weekend, so it's just us. You're going to do every dirty thing I say, and that useless cock stays locked."
I groaned, already leaking. The cage was tight, custom, the kind that forces your balls to hang heavy and exposed. My sister, Rachel, was twenty-four, two years older than me, and she'd always been the bossy one. Now she was the one in charge of my orgasms, or lack of them.
"Get on your knees," she ordered. I dropped fast. She hiked up her skirt, no panties underneath, and grabbed my hair. "Lick. And don't you dare try to touch that cage."
Her pussy was already wet, shaved smooth, and I buried my face in it like a starving man. I licked long and sloppy, sucking her clit the way she liked, tongue pushing inside her while my trapped cock throbbed and dripped. Every time it tried to get hard, the cage bit down, turning me into a leaking mess on the floor.
Rachel rode my face hard, grinding until she came with a sharp cry, thighs clamping around my head. "Good boy," she panted. "Now strip and bend over the bed."
I obeyed, ass up, cage swinging between my legs. She came back with lube and a thick strap-on. "You've been a horny little pervert staring at me for years. Time to get fucked like one." She worked two fingers into my ass first, then the dildo, stretching me open while I moaned into the sheets. The cage bounced with every thrust, my denied cock leaking a steady stream onto the mattress.
She fucked me deep and rough, one hand reaching under to tug my balls. "Feel that? You're not coming. Not tonight, not tomorrow. Maybe not for weeks. This is what incest male chastity sex stories are really like, huh? Your own sister owning your dick."
I begged, voice broken. She just laughed and pounded harder until she got off again from the harness rubbing her clit. When she pulled out, she left me shaking, ass gaping, cock purple and straining.
The whole weekend was like that. She made me eat her out every few hours, sometimes while she watched porn on her phone and ignored me. She pegged me again in the shower, cage locked and soapy, balls aching. At night she let me sleep naked beside her but tied my hands so I couldn't even tug at the cage. Morning wood was pure torture, the metal unforgiving.
By Sunday night I was a wreck, desperate, leaking constantly. Rachel finally took pity, sort of. She unlocked the cage but didn't let me come. Instead she jerked me slow, edging me right to the brink over and over until I was sobbing. "You want to come inside your sister? Say it."
"Please, Rachel, fuck me, let me come in you."
She climbed on top, sank down on my raw, freed cock, and rode me hard. "Come then. Fill your big sister's pussy like the filthy incest slut you are."
I exploded the second she gave permission, pumping rope after rope deep inside her while the cage sat forgotten on the nightstand. She kept riding through it, milking every drop, then made me clean her up with my tongue.
When she clicked the cage back on afterward, I didn't even protest. The ache felt right. She kissed my forehead, almost sweet. "Good boy. We'll do this again next weekend. Maybe Mom can join in."
I shivered, already getting hard again in the cage. The key went back around her neck, and I knew I was hers until she decided otherwise.
