Chapter Text
It had been a few days since Grace and Rocky hauled the blood-soaked man into the Hail Mary. Between redistributing rations, stitching and bandaging wounds, and repairing minor damage to the hull, neither had gotten much sleep. And they hadn’t had much time to relax, either. Rocky stands up from his workbench and stretches, letting out a low groan that catches Grace’s attention. Consequently, the younger man’s eyes are drawn to the raised hem of the Eridian’s shirt, exposing his toned midriff. Grace feels warmth pool in his lower belly, then mentally scolds himself. He has a mate, he reminds himself, but he can’t stop staring.
“Rocky know Grace looking,” the Eridian croons. Heat spreads through Grace’s cheeks and he quickly looks away, trying to focus on his taumoeba samples.
“Sorry,” the blonde mutters. “Delirious. I haven’t slept in a while.”
“Rocky know. Will watch Grace sleep.” For some reason, that simple, innocent promise makes his belly flip in a way that has him clenching. Being in such an unaware state, having the only other conscious someone in your vicinity entirely devoted to keeping you safe, able to do anything he pleases…
Grace mentally shakes himself. “Thanks, bud.” He hopes to whatever higher being that his voice doesn’t give his thoughts away. But Rocky tilts his head.
“Grace heart beating fast fast fast. What wrong, question?” Grace’s face flushes and he can barely look at the alien man. Those piercing eyes seeing into every corner of his being, every nook and cranny of his internal structure, there’s no way he can’t tell how wet Grace is.
“Oh, nothing. Just. Just tired.” The lie tastes bitter on his tongue. Rocky senses it immediately.
“Grace lying, statement. Heart not beat fast when tired. Heart beat fast when scared. Excited. Adrenaline, arousal, statement. Tell Rocky truth.” And God, if that doesn’t undo him right then and there.
“Fine, fine! I’m aroused. Sexually.” He can’t bear to look at his friend, for fear of how he’ll be looked at. Afraid to see disgust, disappointment, rejection. But the low whistle that Rocky expresses conveys a different reaction.
“Should have just said so, statement,” the Eridian croons, taking a step closer. “Rocky sexually aroused by Grace too.”
“But… but your mate?” Grace blinks dumbly. Surely he’s making this up? Some kind of dream, he’s passed out in the lab from exhaustion?
“Eridians can choose multiple mates. Can mate for pleasure, not only reproduction.” A shiver runs down Grace’s spine and sends pure energy right to his core. A whimper escapes him before he can stifle himself, and Rocky smirks.
“Grace want, question? Want Rocky breed Grace full of eggs, give Grace lots pleasure? Grace say yes, question?”
Grace can barely form a word, blood rushing to his cunt. He nods weakly, then nods again, harder. Rocky chuckles.
“Grace take clothes off, lie down, statement.” Rocky places the quilt haphazardly upon the floor, humming softly. Grace busies himself with stripping down to his boxers. At Rocky’s glance, he slowly peels the soaked fabric from his dripping pussy. And Rocky moans.
“Grace so leaky, statement,” he growls. “All for me.”
The possessive tone in Rocky’s voice makes Grace’s knees weak. Thankfully, he manages to find his way onto the quilt before dropping. Rocky pounces on him instantly, trailing his hands all over Grace’s heated skin. His thumbs graze the mastectomy scars under his nipples with a reverence that makes tears sting behind Grace’s eyes. Then Rocky pinches his nipples lightly and starts rolling them.
“R-Rocky, oh my g-goodness, I didn’t teach you tha-at!” Grace stumbles over his words as pleasure rockets through his nerves. Rocky grins.
“Rocky did research. On portable Earth thinking machine.”
“You- mmh- you watched-?”
“Watched, read, yes. Learn many things. Grace very aroused, very leaky. Grace like this stimulation, question?” The Eridian smirks knowingly, already confident of the answer. Grace can barely manage a small “mhm” before his eyes roll back.
“Good. Grace want more, question?” Rocky leans in. “Will give kiss if Grace want.”
The blond man nods and Rocky crashes their lips together, his free hand holding the nape of Grace’s neck. Grace can only moan into his mouth as Rocky introduces his tongue. He traces Grace’s gums, his teeth, his tongue, much to the biologist’s excitement.
“Rocky read that humans very sensitive,” the Eridian croons, pulling back slightly. “All over. Is true, question?”
Grace can only manage a nod.
“Where Grace want touch, question?”
“F-finger me,” Grace gasps, spreading his shaky legs. Rocky groans aloud at the sight of the blond man’s soaked pussy.
“Grace so fucking pretty,” the Eridian growls. “Self-lubricate. Like Eridian. Very good.” Rocky introduces his fingers to Grace’s vulva with gentle, reverent touches, stroking through his labia as if it were the most normal thing in the world to do. Grace quivers, tears leaking from the corners of his eyes. It feels so good, not just because he’s horny but because he’s not alone. Because someone else is touching him. Rocky wants to touch him.
He doesn’t realize how much he’s started crying until Rocky pulls back, much to Grace’s own displeasure.
“N-no,” he whimpers, “don’t stop, Rocky, please.”
“Grace crying. Very much, statement. Grace okay, question?”
“Grace okay,” the blond man nods through his tears. “Very much okay. Please keep going.” Rocky hums an answer and returns to worshipping the human’s vulva.
“Adrian study Grace on Erid,” the alien croons. “Adrian xenobiologist and architect. Will make Grace home on Erid.” Grace barely processes the promise of his own space on Erid, his brain instead latching on to the concept of having his own body be the focus of a scientific study. Rocky trills as Grace’s arousal intensifies even more.
“Grace like that, question? Want to be good little lab toy for Adrian?” the alien croons. Grace gasps, a bolt of liquid heat running straight to his core. He nods. Rocky guides two fingers into Grace’s channel.
“Good. Rocky test stamina first,” the Eridian purrs. Grace’s eyes roll back. Rocky hums deeply and crooks his fingers, curling them in a little ‘come hither’ motion. Grace almost screams, but the noise escapes him as a shrill whimper instead. He faintly registers that he’s drooling, but his mind goes blank as Rocky’s thumb meets the underside of his engorged clit. The blond sobs.
“Rocky, Rocky, Rocky,” he cries, unable to do anything more than chant the Eridian’s name. Rocky purrs.
“Yes, Grace?” He applies more pressure to Grace’s clit. Grace writhes and keens.
“Close,” the blond sobs. Rocky grins.
“So soon?” the Eridian croons. “Fine. Cum.” With that permission, Grace’s back arches and he screams. Clear fluid gushes out from around Rocky’s fingers, soaking the quilt. Grace’s legs tremble and he pants hard, eyes closed.
“Hot,” Rocky purrs, removing his fingers from Grace’s oversensitive channel. The scientist squeals and a little more fluid spurts out. Rocky licks his fingers.
“Grace taste good good good,” he growls. “Want more. Is okay?”
Grace nods, still panting, eyes still closed. “Just gimme a moment to catch my breath.” But Rocky doesn’t hear him, or maybe just doesn’t care. He slips between Grace’s legs, lying on his front on the quilt, and holds the blond’s quivering thighs apart.
“Rocky eat Grace pussy,” the Eridian hums, and Grace keens.
“Yeah, yeah, okay, just hold on a second!” he gasps. Rocky pouts.
“Grace so wet and leaky. Make Grace feel good good good. Eat Grace pussy out. Why wait, question?”
“Because, Rock, it’s really freaking sensitive after I orgasm. It can get kinda painful if you keep going.”
“Grace like pain, statement. Rocky seen Grace hit self when masturbate. Grace masochist, question?”
Grace blushes. Of course Rocky had seen him get off. He can see through walls, and his hearing is exceptional.
“Fine, yes, Grace masochist. Statement. I like a little pain during sex. Overstimulation falls into that for me.” He feels his face flush deeper. All Rocky does is smirk.
“So, can eat Grace pussy now?”
“Yes. Fine. But we’re going to have to discuss kinks at some po-oh frick!” Rocky doesn’t let Grace finish his sentence, instead diving between the scientist’s thighs to lick his folds. Grace squirms, his fingers flying to the Eridian’s hair. Whether to keep him where he is, pull him away, or push him down more, he doesn’t know. But Rocky just chuckles and moves his tongue to Grace’s clit. Grace’s body does an involuntary sit-up from the surprise spike in pleasure. Rocky locks eyes with Grace from between the blond’s legs. And the heady look he gives is enough to send Grace into another orgasm. His eyes roll back and he cries out, his thighs clamping around Rocky’s head. Rocky licks and slurps and sucks at Grace’s vulva with reverent greed, extending the scientist’s climax until Grace starts pushing his head away with weak little whimpers.
“Did so good,” Rocky purrs. “So wet and leaky.” Grace shivers.
“Gosh, Rock, I think… I think I might’ve squirted.”
“No understand.” Rocky tilts his head.
“Ah, it’s the female equivalent of ejaculation, pretty much. Diluted urine mixed with secretions from the Skene’s glands.”
“But Grace not female, statement. Confusion.”
“Oh boy, yeah. How do I explain this? Humans are divided into two biological sexes.”
“Yes, Rocky know this. Is stupid. All kinds of genetic combinations.”
“Yes, well. Some people are born one way but feel different on the inside, so they transition from one gender to another. Genders and sexes are different from each other.”
“Oh, understand. Grace transition gender, question?”
“Exactly.” That was easier than expected.
“Wonderful. Rocky make Grace squirt more more more. Have given enough time for Grace catch breath, question?”
“I-I suppose, yeah, but-” Rocky hums and parts Grace’s legs again. “Rock, buddy, wait!” Grace gasps. Rocky blinks.
“Grace okay, question?”
“Grace okay, yes, but- gosh, Rocky, you have a lot of stamina. Grace tired, okay?”
“Oh, understand. Grace take nap, Rocky watch sleep. Will work on stamina gradually.” Grace lets out a soft sigh of relief. He sincerely doubts he’d be able to handle three squirting orgasms in a row. Rocky hums and works the quilt into a makeshift nest for Grace.
“Need word from Grace.” Rocky settles beside Grace, stroking the blond’s thigh softly.
“What word?” Grace hums drowsily.
“When Grace said Grace masochist and like overstimulation, called it something. Said need to discuss.”
“Oh, my kinks?”
“Yes, that one.”
“Kinks are things that make sex even more enjoyable and exciting. They vary from person to person, so it’s important to have a talk about what you feel okay with and what’s uncomfortable.”
“Thank. Will discuss after Grace nap.” Rocky nods solemnly, pulling a chuckle from Grace’s chest.
“Alright, bud. I’m gonna sleep now.” He rests his head on Rocky’s chest and closes his eyes. Rocky hums softly, content.