Blake is quite skeptical.

"Oh hi guys!" Blake jumped slightly as she noticed Ruby and Yang approach. "What's up?"

"We got something great to tell you!" Yang grinned as she bent forward with her hands behind her back, putting her face closer to Blake's, who leaned back a bit in surprise at the motion. "You familiar with genies?"

"Um, what?" Blake asked. "I mean, I guess I am, what about them?"

"Well, Yang got turned into one," Ruby pointed to Yang, before explaining the whole thing, including that Yang was specifically a Sex Genie.

"...pull the other one," Blake said flatly.

"We're serious!" Yang pouted. She crossed her arms as she straightened up.

"Relax Yang," Ruby grinned as she put a hand on Yang's shoulder. "She just needs some proof, doesn't she?"

"True enough," Yang grinned back at Ruby. So Mistress, what shall we do to prove it to her?"

"... you're not going to do anything too crazy, are you?" Blake asked nervously, wondering if this may not be a joke after all.

"Relax, nothing will be done to you just yet," Ruby grinned before looking at Yang. "Yang, I wish your boobs would double in size for five seconds."

"Okay~!" Yang chirped as she pulled her top up, and snapped her fingers. Blake stared and blushed as she watched Yang's tits swell quickly. They remained comically oversized for five seconds, before shrinking back down.

"...okay, Sex Genie... Let's say I believe that now," Blake nodded. "So where do we go from here?"

"Well, if you want, we can grant whatever deep sexual fantasies you have, so long as they don't clash with our morals of course!" Ruby said. "And we'd like to invite you in on the fun!"