The siblings' shared living room was cozy and familiar, filled with the warm glow of the setting sun. Emma and Ethan had always been close, but as they grew older, they found themselves becoming closer in ways they never expected.
Emma was lounging on the couch, flipping through channels on the TV, when Ethan walked in. He had a mischievous glint in his eye that she couldn't help but find intriguing.
"Hey, Emma," he said, plopping down next to her. "I have a favor to ask you."
She raised an eyebrow. "Oh really? What is it?"
He took a deep breath, as if gathering his courage. "I want you to... play with my ass."
Emma's eyes widened in shock and amusement. "What? Are you serious?"
Ethan nodded. "Yeah, I know it's weird, but I've been curious. And you're the only one I trust to do it."
Emma couldn't help but laugh. "You're such a weirdo, Ethan. But okay, I'll do it. For science."
She got up and went to the kitchen, returning with a bottle of lotion. She squeezed some onto her fingers and approached Ethan, who was nervously fidgeting on the couch.
"Relax," she said, gently massaging his ass. "Is this enough?"
Ethan shook his head. "No, it's not enough."
Emma rolled her eyes and increased the pressure. "You're such a pervert, Ethan."
Ethan moaned in pleasure, causing Emma to smirk. She continued her assault on his rear end, increasing the pressure and intensity.
"Do you want more?" she asked, teasing him.
Ethan nodded eagerly. "Yes, please."
Emma inserted a finger, causing Ethan to gasp. "Is this enough?"
Ethan begged for more. Emma added another finger, causing Ethan to squirm.
"Toughen up, Ethan," Emma said, laughing.
She began to move her fingers in and out, causing Ethan to moan and pant.
"Do you like it?" Emma asked.
Ethan nodded frantically. Emma increased her speed, bringing Ethan to the brink of orgasm multiple times before allowing him to release.
Ethan cried out in pleasure, causing Emma to smirk. She removed her fingers and playfully insulted him.
"You're such a slut, Ethan. And easy, too."
Ethan blushed and thanked her. Emma laughed and agreed to do it again sometime.
As they settled back into the couch, Emma couldn't help but feel a newfound respect for her brother. He was bold and adventurous, and she was happy to help him explore his curiosities.
"You know, Ethan," she said, grinning. "I might just have to write a book about this."
Ethan laughed. "Only you, Emma."
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