Ruby Rose was dealing with an issue. Just a small one…

Okay that was a lie it was a huge issue, one that plagued her mind multiple times a day. At best it was a mild annoyance, at its worst it consumed her thoughts so much she literally lost her motivation to do most of anything. Even her hobby of creating life sized weapons for fun had suffered under it.

What was this issue that took a toll on the young woman.

She had a crush on her sister's boyfriend…

Her older half-sister Yang had been dating this guy for the past six months and so far they seemed to be really happy. His name was Jaune Arc, apparently from a very old prestigious family of knights, the moment Ruby heard that alone she already felt slightly enamored before she even saw him. But when she finally saw him that's where it all went downhill.

He wasn't anything special looking, tall with blonde hair and a well-trained physique, nothing to spectacular but she just felt this aura of genuineness around him. And the way he treated her parents with respect and dignity, so much more different than the other guys Yang had dated.

Yang was the definition of a blonde bombshell, tall, athletic with a sexy figure to match, which made Ruby secretly kind of envious. Yang had everything that guys found attractive, she was sweet yet also strong and not easily messed with, very proud of her long golden locks and she had hips that well…didn't lie.

And what did Ruby have? Aside from her mother's hair and silver eyes and just as much training as her sister, in terms of sex appeal she felt she was severely lacking.

It had never bothered her much before until Yang started dating Jaune, that's when she began to notice the differences between her and her sister. Now she loved Yang dearly and never had fights with her as they grew into their teens, she was never jealous either. That was until he entered.

As soon as she saw Jaune and spoke to him for the first time, her heart was beating in her chest, and feelings she never knew she had started to develop that day.

That night she had her first erotic dream ever, and when she woke up her damp panties made it perfectly clear to her what was going on.

And from that day onward conflicting emotions arose within her. On the one hand she was happy for her sister that she had found someone who seemed genuine, sweet and kind. But on the other hand every time she saw the couple together, snuggling on the couch, kissing each other. Just anything.

Of course she said nothing, usually spending her time working on her fake weapons along with her uncle Qrow, if only to get her mind of off her own feelings.

But they still kept haunting her, even now in the middle of the night as she tried to sleep but couldn't, her mind overwhelmed by thoughts about her sister's boyfriend.

Getting out of bed she sighted with her head in her hands, frustration filled her up as she tried to make the images in her head stop. Things she shouldn't be thinking about, after all this was her sister's boyfriend, HER SISTERS.

Feeling unable to go back to sleep she stood up from her bed and walked out of her room, heading straight to the bathroom. Filling up a glass of water she drunk it in one fell gulp. Staring into the mirror she sighed as she tried to collect her thoughts and sort them out.

"You're going to be alright Ruby, just remain calm, focus on other things" she said to herself in the reaction.

As she proceeded to walk back to her room, she suddenly heard a small yelp, knocking her out of her thoughts and making her turn around, trying to dictate the origin of the sound. As another yelp came around, Ruby turned towards the door to Yang's room, finding the sound coming from there.

"I shouldn't…." she thought to herself.

But against her better judgment she started moving towards the door of her sister's room, her hand silently and slowly reached out to it, her fingers curling around the door handle. Taking a deep breath Ruby slowly clicked the door open, a slight crack was heard and she waited for a few seconds whether or not she heard something.

And surely she did hear something, but it was a sound quite unlike anything.

It was her sister moaning audibly.

Peeking her head down and looking inside she found a sight that made her cover her mouth with her hands as to not gasp out of sheer shock.

Before her on the bed was a butt naked Yang on top of an equally as naked Jaune, she was riding him furiously, her big breasts where bouncing with the rhythm as she went up and down, her face consumed by passion and pleasure.

"Oh Gods baby you feel so good!" Jaune moaned out audibly.

"Fuck so good!" she heard Jaune say.

Ruby couldn't believe what she was seeing, she's always had the suspicion they were doing this, I mean they were a couple after all but seeing it with her own two eyes was a whole another matter entirely and she didn't know how to feel.

She was watching her sister have sex? With the guy she was secretly crushing on. Ruby didn't know she could feel both so devastated as well as so turned on at the same time.

Ruby silently watched the pair go at it. She saw Jaune's face twist and turn with pleasure as he bucked his hips upwards, and her eyes scanned his body, hoping to get a sneak peak at his manhood, which was obviously sheathed deep inside Yang.

"I shouldn't be looking at this."

And yet here she was doing just that, watching a sight that was forbidden, meant for only the two people involved. It was wrong, Ruby knew that much. But yet she couldn't stop watching it.

She watched Jaune raise his hands and grab Yang's mounds, squeezing them and making the blonde bombshell moan out in pleasure.

"Fuck so good Jaune! I love it when you play with my tits" Yang moaned out.

This made Ruby recoil slightly. Looking down at her own small breasts hidden underneath her pajama top made her feel almost insecure at how small she was compared to Yang. It was understandable being her younger sister but Ruby wasn't as well-endowed in the chest area like her sister and it often made her feel insecure.

Ruby was like small and adorable, while Yang was tall and had many curves, curves which most men loved.

As was shown as Jaune moved his head up and bit sucked on Yang's breasts with vigor, making her moan it out almost a bit too loud, before she covered her hand with her mouth. What followed was Yang grabbing Jaune's face and kissing him deeply as she kept riding him, the pleasure on their faces evident.

Ruby looked at the sight too much, she took a step back, pulling the door back with her and softly closing it before quickly scurrying off to her room.

Once there Ruby fell down on her bed, tears streaming down her cheeks and onto the bed, she mumbled against herself as she allowed the tears to consume her.

"Why can't he like me!"

"Why can't I be beautiful as Yang."

All these words were spoken and hit her right at her core, her insecurities spiked up and her pent up emotions where let out right then and there. She couldn't get the sight out of her mind, the sight of her sister and her crush having sex, their lips touching, Jaune grabbing her by her breasts, sucking them, the intense fire burning between the two.

Ruby angrily punched her bed sheets, cursing her own small chest, cursing herself in general for not being noticed by Jaune. She wished she could switch places with Yang at that moment, that she could be the one on top of him.

Eventually falling flat on her pillow, tears still streaming down her face until it all tired her out and she drifted off into a relatively peaceful sleep, with her last thoughts being.

"I wish he was mine."


A/N: Yup, everyone a new lemon story from yours truly. I decided to write a proper story with Ruby and Jaune to finish the entire quarter properly, since the Raven/Jaune story is also for a great part with Yang I decided to go with the premise of this one that I just thought up and hope you guys enjoy it as much as you do the other stories.