Chapter Text
"This is… fine," Yang said as she locked the dormitory room door. Weiss and Blake had just left for class, leaving her alone with her baby sister. "This will be fine, right?"
"Uh, yeah. Totally. Suuuuuper fine." Ruby was across the room rubbing her hands together nervously.
"Yeah, I mean, so what if we haven't seen each other in over a year?" Yang said, taking a few steps towards her.
"Right, right," Ruby said, continuing to close the distance. "It's not like we haven't been talking over CCT."
"Yep, that's totally been enough for me," Yang said as she stared at Ruby's chest, trying to judge just how much her sister had grown since they were last together.
"Same, same. Absolutely haven't been thinking lewd thoughts about you every moment since the airship."
They were now close enough to touch, and Yang was almost vibrating with need.
"Yeah, no, neither have I. Besides, even if we wanted to, Weiss and Blake could walk—"
A sudden flurry of rose petals and Ruby's mouth was against Yang's, her little sister's legs wrapped around her waist.
Yeah, they were doomed.
Yang ran her fingertips along Ruby's stockings, tracing her way under the plaid skirt she'd been desperate to ruin since the first time she saw her little sis wearing it. Ruby exhaled deeply and smiled into her mouth as she dug her fingers into the bare flesh of her small, toned ass.
"I. Missed. You. So. Much!" Each of Ruby's words were punctuated by a kiss, and Yang giggled.
"I missed you too sis," Yang said, caressing her sister's butt with her thumbs as she gazed into her silver eyes. "I'm so glad we ended up on the same team."
"Yeah, well, don't expect any special treatment from your team leader just because we're sisters."
"Hmm," Yang said, tilting her head in a mock thoughtful gesture. "What if I were sleeping with the team leader?"
Ruby leaned back and giggled. "Is sleeping with me not enough of a reward?"
Yang smirked. "Why don't we find out," she said softly, and captured Ruby's mouth once again.
She set her sister on the bed and moved to unbutton her own blouse, but Ruby was impatient and had a hand up Yang's skirt, tugging at her panties.
"Come on, get to the good stuff!" Ruby said, and roughly pulled down Yang's underwear. Her eyes went wide at the sight of Yang's erect member lifting up her skirt. "Dang sis, were you always this big?"
Yang grinned and finished removing her shirt and bra, moaning as her sister ran her slender tongue along the length of her shaft. Her fingers threaded through Ruby's black and red mane, gently guiding her head as she took in the first few inches of her cock.
"You been working on your gag reflex?" Yang asked, and the vibration of Ruby's affirmative hum caused her to tighten her grip on her sister's hair.
She slowly guided Ruby's mouth further down her length. True to her word, her sister didn't so much as cough when the tip hit the back of her throat. Yang held her baby sister's head in place as she moved her hips, fucking her mouth slowly and methodically.
"Fuck, sis. You're doing such a good job."
"Mmm mmm mmmm mm mmm mmmm," Ruby tried to say.
Yang laughed and withdrew. "What was that sis?"
"I said, you can come if you want!" Ruby said, then rushed to get Yang's cock back into her mouth. She played with her balls as Yang thrust into her, losing her mind at the feeling of her sister's mouth around her.
"Fuck, I'm almost there." Her hips were moving of their own accord, and Ruby's eyes were filling with tears. "Fuck, fuck, fuck," Yang muttered with each thrust, until finally the release came. She held her sister's face flush against her body as she unleashed down her throat. She looked down to see Ruby's eyes rolled back in her head and quickly pulled out.
"Shit, Ruby are you okay?"
She took a big swallow, collapsed back on the bed, and held two thumbs up. Yang giggled and flopped down onto the bed beside her.
"Yeah… I think that's enough of a special treatment for me," Yang said. She ran her tongue along her sister's slackened mouth, tasting her own mustiness when a knock came at the door. Ruby bolted upright, nearly knocking Yang off the bed.
Yang frantically rushed to cup her hand over her sister's mouth and said, "Uh, be right there!" She put a finger to her lips to signal Ruby to stay quiet, then removed her hand from her mouth.
"But I live here!" Ruby scream-whispered. Yang smacked her with a pillow.
"Just shut up until I see who it is!"
Yang crept towards the door and was about to open it before she realized she was now completely bare-chested. She cursed internally until another knock came, and opened the door just a crack, hiding behind it.
And who she saw on the other side was a grown-up clone of the girl whose mouth she had just fucked to completion. "Oh, uh, hi mom!" Yang said, emphasizing the final word. She heard an "eep!" from behind her and flinched. "Um, what a surprise!"
Summer Rose, her stepmom and Ruby's biological mom, looked at her with a raised eyebrow. "I figured you'd be happier to see me," she said, then held up a basket of fruit. "I brought a housewarming gift! Or is it a dorm warming gift? Well, whatever. Can I come in?"
"No!" Yang cleared her throat. "I mean, it's kind of a mess."
Summer grinned. "Honey, I shared a dorm with Qrow." She attempted to peer past Yang into the room, then her eyes widened. "Wait, do you have a girl in there?"
"Uh, yeah, kind of."
"Can I meet her?"
"Oh, uh, well," Yang stammered, then lowered her voice to a whisper. "She's uh, kind of dumb. I don't really think it's going to work out. Anyways." Yang quickly grabbed the fruit basket and pulled it inside. "Thanks for the fruit, talk to you later mom!"
She slammed the door shut and locked it, then collapsed to the floor.
With a shower of petals Ruby was suddenly standing over her with her arms crossed. "Did you just call me dumb to our—ooo is that honeydew?"
Yang held up the basket for her sister to take. "You are literally the only person on Remnant who likes honeydew, I hope you know that."
"Mo fo m tha," Ruby mumbled through a mouth full of fruit as she sat down beside her.
Summer showing up was an unexpected wrinkle in how Yang thought her time at Beacon would go. She knew she was a teacher here, but to show up at their dorm meant Summer probably expected to continue down the path they'd trod since Ruby left for Signal.
It had been tough for Yang not to have her sister by her side. It was like a piece of her was missing, a piece she'd never known she needed, even after they'd transitioned together, even after they'd started being more than just sisters.
But Summer was there, to comfort Yang, to do what she could to fill that hole. It worked for a time, but eventually Yang saw it for what it really was: a distraction. She loved her stepmom, and the sex was incredible, but the relationship she and Ruby had extended beyond the physical. It wasn't just about loving and caring for each other, it was about understanding each other. And as great a stepmother as Summer was, she could never truly understand her the way Ruby did.
"Mmm, I'm stuffed," Ruby said, licking her fingers. "And now it's time for you to get stuffed."
Yang giggled and shoved her shoulder. "You're such a dork."
"A dork with a dork that needs to get… forked? Yikes, never mind."
Yang giggled again and leaned over her sister, kissing her softly, reaching under her skirt. "And how exactly would you like your dork to get forked?"
Ruby hummed and idly played with Yang's bare breasts. "I think these might do the trick."
"That reminds me," Yang said as she started unbuttoning Ruby's blouse, "It looks like you've grown quite a bit since we last saw each other."
"Yep, I've got proper titties now! No more puffy nips."
"I'm gonna miss that noise you always made when I pinched them," Yang said, lifting up her sister's bra then taking a nipple between her thumb and index finger, and Ruby yelped. "Or not."
"Just because they're grown doesn't mean their not sensitive! But… it feels a lot better now."
Yang grinned, using one hand to stroke her baby sister's cock and the other to fondle her breast, planting kisses up her shoulder and neck as she breathed heavily. "You can use my tits if you want," she whispered into her sister's ear, "but I'd really love to feel you inside me."
Suddenly Yang felt like she was outside of her body, flying through space on a cloud of rose petals, and when she returned moments later she was in a daze, laying on the bed next to Ruby. "I've got the lube!"
"Sis, you've really got to warn me before you do that."
"Yeah, yeah, shut up and turn over!"
"I have a better idea," Yang said, pushing her sister down onto her back and grabbing the bottle of lube. "Oh, uh, you don't have any condoms do you? Not that I mind, as long as we're both still on the meds." Ruby modded, and Yang applied a generous amount of lube to her sister's cock and her own asshole, inserting one finger, then another.
"Come on sis what's the hold up!" Ruby whined impatiently, tugging at Yang's nipples.
"Rubes, you've gotten bigger since the last time. I'm just trying to prepare myself."
Finally she lowered herself onto her sister's length. It took some maneuvering but when she managed to get the tip inside her she let out a shuddering gasp. "Fuck, Ruby."
She continued lowering herself slowly, closing her eyes and moaning into the pleasure of her baby sister's cock putting pressure on her prostate. She swiveled her hips as the last inch entered her and looked down at her darling sister's face. "I love you so much, Ruby."
"I love you too, Yang"
Yang leaned down to kiss her, content with just holding her sister inside her, their bodies as one, but Ruby started to squirm.
"What's wrong sis?" Yang teased with a smirk, pressing herself harder on to her sister so that she couldn't move. "I said I wanted you inside me, and you're inside me."
"Yang," Ruby whined, her hips struggling in vain against her big sister's weight.
Yang sat up, held onto the bottom of the bed above them and used the leverage to push down even harder. "You're almost sixteen," she said. "Stop acting like such a child."
Ruby growled and pointed a finger dramatically at her. "As your team leader, I order you to let me fuck you!"
Fuck, that was hot.
Yang started to gyrate, careful to not let a single centimeter of her sister's cock leave her. "I don't have to follow your orders sis, we're not on a mission."
"Wrong! Huntsmen's Manual page seventy-four, paragraph three: 'Team members must follow the instructions of team leaders at any time the safety of the team members or team leader is in jeopardy.'"
"Okay, and?"
"And, if I don't come inside you soon I'm literally going to die."
"Dork," Yang said with a laugh.
She finally relented, letting go of the bed slats above her and leaning down over her baby sister. They started slow, kissing softly as Ruby fucked her carefully and methodically, Yang's flaccid member quietly slapping against her sister's taut stomach.
The angle started to get awkward so they switched positions. Yang laid on her back, lifting her legs into the air. Ruby was fumbling at her entrance and Yang huffed.
"Come on sis, what's the hold up?" she said with a smirk. Ruby raised a middle finger and then suddenly pierced her, causing an uncharacteristic yelp to escape Yang's mouth.
"Mmm you're so tight big sis, have you been doing ass kegels or something?"
The new position gave Ruby much better leverage and Yang could barely make words as her baby sister pounded her hole. "Ass kegels aren't a thing." She arched her back and cried out as Ruby adjusted her angle just right to hit her big sister's prostate with every thrust. "Fuck, right there Rubes. Don't stop."
"Sis I'm going to come, can I?"
"You're the team leader," Yang said, her mind almost mush.
Suddenly she felt a rush of warmth as her little sister let loose inside her with a groan. With a loud squelch Ruby withdrew and collapsed next to Yang.
"That. Was. Incredible."
Yang's breath gradually slowed and she turned to face Ruby.
I should tell her.
"Hey Rubes, I—"
She was interrupted by the jangling of keys outside the door. Yang rushed to cover herself and Ruby dissipated into a cloud of rose petals just as the door opened.
"Oh, uh, hey girls!" Yang said as Weiss and Blake walked in.
"Uh, hi?" Weiss said, eyeing the discarded clothes on the floor. Blake cocked her head and wrinkled her nose, then narrowed her eyes at Yang.
"Oh!" Yang stammered, "Um, these sheets are just so comfortable you know?"
Weiss then looked up at Ruby, sitting in Yang's top bunk with her blouse haphazardly pulled over her chest. "Yeah! And uh, we wanted to see if maybe we should switch bunks because, you know, I'm smaller and it might be safer if I was on top. On the top bunk!"
Blake coughed to hide a laugh. "Hey Weiss, could you give us a minute?"
Weiss narrowed her eyes. "Yeah, I should probably get these to Jaune and Pyrrha."
With Weiss gone, Blake looked between the two sisters. "You had sex."
"What?" Yang said, far too indignant to be believable. "That's disgusting."
"You're saying sex with me is disgusting?" Ruby said and Yang put her head in her hands. "I mean, yeah! Don't be disgusting, Blake."
"Look, it's fine. There are… parts of Remnant where it's not looked down on as much."
"You're not going to tell anyone, are you?"
"Of course not," Blake said, then toyed with the black bow in her hair. "Everyone has their secrets. You just might want to watch yourself around Weiss. She doesn't exactly seem to be the understanding type."
"It's all right, this was a one-time thing. It's just—"
"A one-time thing?" Ruby whined. "Can't we just have a code phrase or something? Like I can tell Blake 'I'm going to put my sausage in Yang's donut' and she can keep Weiss away from the dorm for a bit."
"How can that be interpreted as anything but sex?"
Blake sighed and pinched the bridge of her nose. "Or, you could just put a sock on the door."
"Oh, yeah. That works."
"Great. Now let's get this mess cleaned up before she gets back," Blake said, tossing the girls clothes to them. "And I'm going to open the window. I could smell your cum from down the hall."