Sister

As the days turned into weeks, Adam's cock continued to grow at an astonishing rate – now measuring a staggering 14 inches long and nearly four inches thick. His balls had swollen to the size of grapefruits, churning out enough cum to fill a milk jug. And with his newfound confidence and insatiable lust, Adam found himself using his sister Sarah more and more as his personal fucktoy. Luckily his mother was never home to notice.

It started innocently enough – a quick blowjob here, a casual fuck there. But soon, Adam had Sarah completely under his spell, addicted to the feel of his massive cock stretching her tight pussy and flooding her with his potent seed. She began spending all her free time in Adam's room, eagerly awaiting his every command.

"Get on your knees, slut," he would order her imperiously as he entered the room. Sarah would immediately drop to all fours, crawling over to worship his colossal member with her tongue and lips. She loved nothing more than having him use her mouth and throat like a fuckhole, **** and gagging on his enormous shaft as he held her head in place and fucked her face relentlessly.

Adam quickly grew tired of just using Sarah's mouth, though. He wanted to claim every inch of her body for himself again – to make her into his own personal whore and ****. So one evening, after a particularly rough facefucking session, he pulled out of her throat and flipped her over onto her back, spreading her legs wide as he loomed above her with his massive cock throbbing in his hand.

"You're mine now," Adam growled possessively as he lined up the head of his dick with Sarah's dripping slit. "Your pussy belongs to me... your mouth belongs to me... everything about you belongs to me, understand?" Sarah could only nod weakly in response, her eyes glazed over with lust and submission as she awaited his next command.

With a single thrust of his hips, Adam buried himself balls-deep inside his sister's tight cunt, stretching her wider than ever before. Sarah screamed in both agony and ecstasy as he began pounding into her mercilessly, his heavy balls slapping loudly against her ass with every powerful stroke. He fucked her harder and faster than he had ever fucked anyone, determined to ruin her for all other men...

By the end of the week, Sarah was completely broken – a shell of her former self, existing only to serve Adam's every whim and desire. She spent her days naked and on her knees, ready and willing to service his cock at a moment's notice. Her pussy was constantly sore and dripping with his cum, but she never complained... in fact, she begged for more, **** to feel him inside her again and again.

Adam reveled in the power he held over Sarah, loving how easily he had molded her into his perfect little fucktoy. He knew he could do whatever he wanted with her now – use her holes however he saw fit, without a single complaint or protest. And as his cock continued to grow even larger, Adam found himself wondering just how far he could push things...

Little did Adam know, the pills that had transformed him into such a sexual powerhouse were starting to have unforeseen consequences – not only on his own body, but on those around him as well. And as the days turned into weeks, the true extent of their effects would become terrifyingly apparent...