Parasites

Finley slowly awoke to the sounds of someone begging to be untied. As he began to focus he saw his sister Sarah nearby, lying naked while restrained to a bed on her front with her head facing his. Finley soon realised he was similarly naked and restricted, and began demanding they be released as he tried and failed to move. Suddenly Finley felt something hot splash on his back, and shuddered as a pair of hands clenched his chest, and another pair of hands grasped his ass. Sarah screamed as she watched the creature attach to her brother and quickly transform him into a sexy silver femboy. She soon fell quiet as he now lay motionless, and couldn't help but lustfully gaze at his erotic body.

Suddenly Finley opened his eyes and pulled at his restraints, easily freeing himself with his enhanced strength. Sarah gasped in shock as he slid off his bed to move behind her, and screamed as she felt him leak hot liquid on her cunt and butt. However her screams of terror soon became moans of pleasure as her slit and ass were swiftly corrupted, becoming long tight holes filled with sensitive ribs, warts and spikes. Finley and Sarah moaned together in intense pleasure as he plunged his massive cock deep inside her long tight cunt. Lying on top of her and groping her tits, Finley started lustfully fucking Sarah. They moaned in immense pleasure as the matching protrusions lining their dick and slit slickly rubbed together. Finley thrust harder and faster as Sarah moaned louder and quicker, soon fucking as hard and fast as possible. Suddenly they screamed together in **** climax and explosively gushed silver from their mouths, chests and butts. Finley powerfully came silver from his massive cock, coating Sarah's long tight cunt and filling her up with silver.

Eventually emerging from their intense orgasms, Finley and Sarah moaned together in satisfaction. Slipping off her he stood up and untied her from the bed, and stood back as she rolled over to lie on her back. While lustfully gazing at each other, Finley jerked his massive dick and Sarah rubbed her oozing slit. Soon they masturbated harder and faster as they moaned together quicker and louder. Suddenly they screamed together in **** climax and explosively gushed silver from their mouths, chests and butts. Finley powerfully came silver from his massive cock as Sarah forcefully came silver from her gushing cunt. Suddenly a massive silver lump erupted from her spewing slit and splashed on the flooded floor.

Eventually emerging from their intense orgasms, Finley and Sarah watched the silver lump form two pairs of hands, and screamed in euphoria as they admired the new parasite they created. As it climbed up her bed Sarah let it crawl onto her back and grab her tits and ass. Letting the new parasite attach to her body she eagerly became the second host of a silver parasite.

Now fully corrupted and imbued with endless strength and stamina, Finley and Sarah relentlessly fucked and masturbated together, producing dozens of silver parasites that swarmed and fondled them to enhance their pleasure. Their corrupted minds never thought to stop fucking and masturbating until their play was interrupted by a nearby door opening.