Somewhere On Top of Rainbow

>it's 1 AM
>Greg sleeping in his van on the beach
>he wakes to the soft light of the night sky as the van back door slowly opens
>Greg groggily squints and makes out endless blonde hair before the figure squats down and shows her face
>it's Rainbow

>"Ro-Rainbow"? Greg asks.
>"Heeey, Greg" Rainbow says as she places one arm in the van, leans in, and then places her knee in as well.
>"Wha- What are you- What time is it?"
>"It's your birthday. You humans make a celebration of it, and you give, gifts, right?" Rainbow says with a cracked grin, now creeping over Greg."
>"Yeah, but... what are you-"
>"Ssshhhh. It was Rose's idea. Pearl agreed. Rose wanted to give you something... special, as a birthday present."

>'Special'? Greg thought.
>Greg's confusion was lifted when Rainbow began running her finger down Greg's chest.
>'And Pearl is in there?' Greg thought.
>Rainbow paused, trying to read Greg's reaction.
>"I saw how you looked at me during the video recording a few weeks ago" Rainbow said while curving her back half stretching her arms in the relatively tight confines of the van, obviously trying to look seductive.
>"You?"
>"Rainbow Quartz, Greg. Rose is in here. But I'm me..." Rainbow quickly places her arms on either side of Greg. "Aren't you curious"?
>"And this was Rose's idea"?
>Rainbow seductively smiles, leans in, and says "I'm going to make this a birthday to remember, little man".

>Rainbow places her face mere centimeters from Greg's, at a slight tilt, close enough to feel radiant body heat, but Greg is disconcerted by the lack of presence he feels in front of him.
>With bedroom eyes, "kiss me, Greg" Rainbow says. Greg is further off put by the authority in her voice.
>Greg closes the distance and their lips touch.
>Rainbow's right arms slides up Greg's left, up his shoulder, neck, into his thick hair, and gently cups the back of his head. They kiss deeper.

>Right as Greg was getting into the moment, Rainbow stops.
>Rainbow leans back a little, expressionless, and stares at Greg for an awkward period of time, as if waiting for Greg to do something.
>Greg begins to nervously blush.
>Rainbow finally talks. "And this is what humans enjoy? Rose has done this with you, and though she never told you, she never quite understood it. As you can see..." Rainbow leans back to stretch again, "gems have very different methods of being... intimate". A devious grin flashes across Rainbow's face.

>"I- I- I-... Yeah, that's what humans do to be, intimate."
>Rainbow widely grins and cocks her head, taking in the moment, taking in Greg's reaction.
>Her reaction changes after almost unnoticeably quick glance to Greg's lap.
>Rainbow leans down to Greg's left, laying on to the floor of the van, her right arm supporting her head and her legs stretching outside the still open doors of the van. Greg scootches over to his right to make room.
>Rainbow's face takes on an innocent expression. "I'd like you to show me what else you humans do to be... intimate. It's one thing for Rose to experience them. But I think you'll find that I'm, not, quite, Rose."

>Greg's face twitches. He is clearly distressed at this statement.
>Rainbow's brow furrows. She expected a positive reaction from a human male.
>Rainbow's expression becomes more innocent yet seductive, and moves her body closer to Greg's, her breasts just grazing his chest.
>"Will you show me?", Rainbow says, running her finger down his chest again. "Men are supposed to be the assertive ones, right?"
>Greg twitches again, and then suddenly his demeanor changes. "Y-Yeah!" Greg says, now confidently, closing his eyes flipping his hair back. He looks back at Rainbow "and you chose the perfect man for the job. I'll show you the universe"!
>Rainbow covers her mouth and snickers.

>Greg leans in and begins kissing Rainbow, increasingly passionately.
>Rainbow's arms wrap around Greg's back, indicating to Greg that she is getting into it.
>Greg leans back, grins, and looks deeply into her eyes. Greg's eyes dart for a moment between Rainbow's two sets. For a second there he had forgot that he was making out with an alien. Even more off putting, Rainbow appears utterly composed. Even Rose was never this detached. Rainbow seemed to just be... observing.
>Hiding his apprehension, Greg smirks and gets back into the kiss, this time moving his hands down Rainbow's side to her hips, and then back up again to her breasts.

>Rainbows arms begin caressing Greg's body as well. She begins to kiss more vigorously, more frequently re-positioning herself in the kiss and occasionally bobbing her head forward as if she could get deeper into the kiss.
>her arms firmly grip Greg's butt and then slide up under his shirt
>Rainbow helps Greg take off his shirt
>she breaks away from the kiss and Greg continues with her neck
>Rainbows vacantly stares at the ceiling of the van, her arms continuing to lustfully grope without abatement.
>"You like this?" she whispers.
>Greg doesn't bother to answer, and puts his hand on Rainbow's crotch.
>Rainbow follows suit, moving her hand to Greg's crotch, and feels...
>another devious grin grows across Rainbow's face, unseen by Greg

>Greg still bringing his A-game, Rainbow delicately unbuttons Greg's pants and slides a hand within, the now only thing separating her and Greg's manhood now a thin pair of briefs
>Rainbow's eyes lazily glance down at her own nether regions and watches Greg's hand rubbing
>"Rose put a lot of time into making us gems look, and feel... human. It's easy to forget... isn't it..."
>Greg pauses for half a moment.
>We put a zipper behind my neck this time" Rainbow whispers.
>Greg moves an arm around Rainbow, feels a hard protrusion, and pulls down along Rainbow's spine
>Rainbows outfit begins to peel away in a glimmer of light and disappear as Greg pulls the zipper ever downward
>the zipper reaches Rainbows coccyx and the shimmering continues on down her legs
>Greg sits up atop Rainbow and admires her nude form in the indirect moonlight

>Rainbow smiles at being admired and does her characteristic stretch of her elbows before sitting up, leaning back and her chest out, her posture supported by her arms behind her.
>even with Greg on top of her lap and Rainbow leaning backwards, their heads were still at teh same relative height
>Greg is once again reminded of how giant Rainbow, even relative to Rose!
>"You're beau-" Greg cuts himself off, suddenly feeling a pang of guilt since this isn't Rose... or at least not quite.
>Rainbow smirks and cocks her head. Greg didn't need to finish what he was saying. Greg was apprehensive, but his reaction was different this time. He didn't try to withdraw from the moment. Humans aren't complicated, she thought.
>She was in control again.

>Greg momentary stare at Rainbows perfect breasts is interrupted by Rainbow quickly putting her hands into Greg's pants.
>Rainbow's knees perch up to hold Greg in place as she forces his pants off.
>Rainbow gingerly grasps Greg's shaft with her index finger and thumb and begins slowly moving her hand up and down
>"I see you're excited", Rainbow says, still pumping.
>"Men are supposed to lead in human intercourse... but you're quite small... even compared to Rose. With fusion the large gem always leads."
>Rainbow adds another finger to the pumping action and grips tighter.
>Greg's reaction to Rainbow's words was being damped by the pleasure of her rhythmic stroking.
>Rainbow suddenly grips Greg's shaft with her entire left hand and firmly cups his family jewels with her other, too firmly
>Rainbow intensely looks Greg's eyes, as if to tell him who is in control
>Rainbow's sudden movement had hit Greg like a bunch to the gut, Rainbow notices and tilts her head quizzically
>"Sorry, I know how fragile humans are", Rainbow pouts. "From now on I won't give it my all", Rainbow smirks almost condescendingly.
>her rhythmic stroking resumes.