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Sister Knows Best: A Lesson in Dominance and Backdoor Fun

Chapter One: The Assignment

Jake nervously approached his sister Sarah's bedroom, his heart pounding in his chest. Sarah was lounging on her bed, a book in one hand and a glass of wine in the other.

"What's up, weirdo?" Sarah asked, not looking up from her book.

Jake took a deep breath before speaking. "I need a favor."

Sarah raised an eyebrow. "Oh? And what favor could you possibly need from me?"

Jake swallowed hard. "I, uh, I need you to stroke my ass."

Sarah burst out laughing. "You've got to be kidding me."

"No, I'm serious," Jake said, his face turning red.

Sarah set her book aside and looked at Jake with a smirk. "Fine, I'll help you out. But you owe me big time."

Jake nodded eagerly. "Thank you, Sarah."

Sarah patted the bed. "Get into position."

Jake hesitated for a moment before getting onto his hands and knees, his ass sticking up in the air. Sarah couldn't help but laugh at the sight.

"You look ridiculous," she said, but she started stroking Jake's ass anyway.

Jake moaned in pleasure, his eyes closed.

"More," he begged.

Sarah raised an eyebrow. "More? You're such a greedy ass."

Jake nodded. "Yes, please."

Sarah sighed. "Fine. What kind of toy do you want me to use?"

Jake described the dildo he had in mind - 7 inches long, 1.5 inches in girth.

Sarah raised an eyebrow. "That's a pretty big toy. You sure you can handle it?"

Jake nodded eagerly. "Yes, please."

Sarah got up from the bed and retrieved the dildo from her closet. She smirked as she looked at Jake.

"You're such a weirdo," she said, but she couldn't help but laugh.

Sarah returned to the bed, dildo in hand. She playfully insulted Jake again, calling him a "greedy ass."

Jake blushed but didn't say anything.

Sarah slowly inserted the dildo into Jake's ass, causing him to moan in pleasure. She started fucking him harder, causing Jake to beg for more.

"You're never satisfied, are you?" Sarah asked, but she continued to fuck him harder.

Jake screamed in pleasure, his body shaking.

Sarah retrieved another dildo, this one 8 inches long and 2 inches in girth. She slowly inserted it into Jake's ass, causing him to scream in pleasure.

Sarah started fucking Jake harder, causing him to beg for mercy.

"You're a glutton for punishment," Sarah said, but she couldn't help but laugh.

Jake, wanting to please Sarah, begged her to cum. Sarah, with a playful smile, told Jake he was "learning" and started to cum, causing Jake to scream in pleasure.

Sarah, spent, slowly removed the dildos from Jake's ass. Jake, still in a daze, thanked Sarah for the "assignment."

Sarah, with a playful smile, told Jake he was "welcome" and ordered him to clean up. Jake, still in a daze, obeyed.

Want to know how it ends?

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