He tells her about his powers

As absurd as it was, he felt it was best if he told Amy about his supposed powers. Sure, he was starting to firmly believe that they didn’t work, but she might see something he was missing. It wouldn’t be the first time he asked her for help on something so fantastical; with how close they were, she might just believe him. Plus, with how often he made her cum by massaging her pussy, she owed him. Lots.

Might be best to keep the genie out of it though.

“Hey Amy”, he began, his words bringing her back from the distraction his fingers were causing, “this will probably sound weird, but I need your help with something.”

“It’s not more girl problems, is it?” she immediately shot back, giggling at the thought of it. “You’ve been single for how long now John? I keep telling you, just use those magic fingers of yours and-“

He quickly cut her off.

“Um, no. It’s nothing like that.” He hesitated, wondering if this was a good idea. “Look, the how and why doesn’t matter, but I’ve essentially been given a gift.”

“I know!” she teased. “And what a gift is it!” she moaned, softly grinding her hips against his hand.

“I’m not talking about my fingers!”

He had said it harsher than he anticipated, but he needed to get her mind off of his fingers. He stopped massaging her pussy, but continued cupping it, speaking quickly before she could reply.

“Essentially, whenever I’m touching someone, whatever I say becomes absolute truth.”

“Oh fuck off” she said, sitting up. “You expect me to believe that?”

“Look, I know you believe me.” He firmly said, resuming his hand motion on her nether lips in order to calm her down.

She rolled her eyes as she lay back on her bed, but smiled as his fingers carried on with their work. “No need to get defensive John, I’m just teasing.” He calmed down despite himself. Why had he gotten upset again? He knew going into this that she’d believe him.

“Okay, what’s the problem with this power then? Does it work?”

“See, that’s the thing. It always seems like whenever I say something, nothing happens. Just the same old world we’ve always lived in, no change.”

“But you’re sure it works.”

“Yes, I think so.”

“Hmm…” Amy suddenly got quiet, lost in thought. This often happened when he was rubbing her while they discussed something important. She always claimed that the motion of his fingers had a calming effect on her; especially after she had already orgasmed.

“What have you tried it on?” she asked after a few moments had passed.

“Nothing too significant” he replied, thinking back. “I tried making your hair longer, tried to make you wear girlier clothes, told you to stop wearing panties, brought us-“

“Stop” she interrupted with a sigh, “you’re just listing things you know about me. You weren’t changing anything that weren't already true.”

“You think I don’t know that?” he asked, feeling defeated.

“Look, try it now” she calmed suggested. “Change something we both know isn’t true; something we can gauge and actively see.”

He thought a bit about what he could say, his fingers occasionally brushing over Amy’s clit, causing her to yelp. He eventually set his mind on something and ensured his hand was still touching her slick lips as he spoke.

“You have the most gorgeous mass of red hair.”

His eyes never left her dark brown locks.

She simply looked at him like he was stupid before lifting a strand of long red hair. She waved it before him and grunted “Uh… I’m a natural red head, remember?”

He blinked.

He blinked again to confirm what he was seeing.

He then slapped his forehead with his free hand, ashamed and embarrassed of what he had just said. Amy has had natural red hair as long as he could remember. How was it that he had done it again? This time around, he had even made a fool of himself in front of his sister.

She sensed his panic through his fingers, their movement having become more eccentric on her pussy, and she spoked quickly to calm him down.

“Okay, okay, look. The only pattern I’m noticing is that you keep saying things that are very, very obvious. Try again with something major; something that goes beyond just you and me.”

He took a deep breath, calming himself down.

“Well then, how about this?” he asked, thinking quickly; his fingers continuing their soft massage on her well lubricated sex, “No one cares what siblings do behind closed doors, be it sexual or otherwise.”

She groaned, half frustrated with him. “Damn it John, if you want this to work, you need to take this seriously!” She gently punched his shoulder, emphasizing the seriousness of the situation.

Amy was right; if his powers had any merits, he’d need to stop saying things that were true. He wondered why he even considered the thought that their friends and family would care about what he and Amy did in their rooms. They were just like every other siblings of the world; having experimented with their sexuality since they were teenagers.

Heck, he and his sister had kept it relatively tamed compared to other kids; they’d never progressed passed fingering! His exes had loved it though, he recalled, thinking back. Those nights where he showed them what his fingers could do surely had to do with why they were always **** to end things with him.

“How about I pick something this time?” she suggested, bringing him back to the reality at hand. “That way, I’ll know for a fact that what you try and change isn’t wrong from the get go.”

He nodded, seeing the wisdom in what she was saying. “Alright Amy, what should I change?”