Ruby loved her big sister. More than anything in the whole world. She knew that Yang and Blake had sex all the time, and she was pretty jealous of the feline. Because the "sun dragon", as Blake liked to affectionately call her, was gorgeous in every way imaginable. She had perfect golden hair, a well toned body, and not to mention beautiful, ample breasts and quite frankly, a really good butt.

The little rose never was a very outgoing or straightforward person, but even less so in this situation.

She wanted to talk to Yang about it. Because as her older sister, maybe she would understand and have some advice for her, or better yet, who knows, Yang might even like the idea.

The dorm was empty for the weekend, since Weiss and Blake had gone on a mission.

"Yang?" the silver eyed girl said as she opened the door to the room.

"What's up Rubes?" Yang replied.

"Well…" Ruby shuffled into the room to get closer to her sister "There's something I really need to talk to you about."

"You can talk to me about anything, you know that Ruby." the blonde replied happily

The younger girl sat next to her, and looked up at the lilac eyes, with her own, silver, puppy dog eyes. "Well, I know I'm your sister, and I shouldn't be thinking this, but…"

Yang interrupted "It's okay Ruby, I know what you're gonna say"

"What?!" the small girl turned as red as roses. "I don't think you know what I'm gonna say Yang. This is kinda…"

The brawler interrupted again "I've seen you look at me Ruby. I saw you look at me in the shower. I saw where your fingers were." she grinned devilishly.

The young leader nearly jumped "What?! No Yang, I swear, I…"

And once more, the big sister interrupts "It's okay Ruby, so do you want to do what you came here for?"

Ruby began to feel sweaty. "Yang, I want to have sex!" she blurted out.

As if she didn't already know. The sun dragon stood up and pulled her shorts down. She saw Ruby stare wide eyed. "Is this really a good idea? She's my sister…" Yang thought, however the brawler quickly discarded the thought and instead thought about how happy she was going to make her little sister whom she loved so much.

Ruby didn't know what to do, her gorgeous sister stood in front of her, in nothing but a tight orange tank top, and black panties. Of course, she had seen her sister in her underwear before, but this felt different somehow. She watched as Yang turned around to go to her dresser and pull something out. She had no idea what Yang was getting though, because she couldn't take her eyes off of the blonde's perfect ass.

"This seems like the perfect size." the blonde said as she closed the drawer.

This was when the younger sister actually looked at what the older sister held. A black phallic shaped object with a tube like part coming out and hooking up at the base. Ruby could hardly contain her excitement when she realized what this meant as Yang took off her panties and put on a harness for the dildo.

"This is a strap-on, Ruby, and I assume you know what I'm gonna use it for." She watched her little sister nod her head. "And this hooked tube goes into my vagina, it lets me feel pleasure from the dildo rubbing your walls." She explained.

Ruby had no idea that was even a thing, this whole experience was all so new to her and she had simply no idea what to say.

Yang grabbed her sister's skirt and forcefully pulled it down with no resistance from Ruby. Next, she grabbed the girl's button up shirt and with her immense strength, ripped it off with no regard for the fabric.

Ruby held out her hand to stop Yang. "Please sis, I can do this part myself" she giggled.

The brawler watched as her sweet younger sister pulled off her bra and panties, and realizing she still had her own tank top and bra still on, she quickly took them off.

This was it. Both of them standing completely naked. Yang looked down to her younger sister. "Okay, Ruby this dildo isn't too big because you've never done this before, but I promise you it's bigger than what most people get for their first time, or anytime for that matter." And the blonde was right, the dildo was a good seven and a half inches long. "And when I first go in, it's gonna hurt, but it won't last long…"

"I know" said the young redhead. "I've been looking forward to this, but Yang?"

"Yeah" she feared her sister was having second thoughts.

"I want to suck on it first"

"She's definitely not having second thoughts", Yang thought to herself. " Well if that's what you want to do, sis, I won't say no."

"And one more thing, you don't have to be gentle" Ruby said sheepishly

Yang looked at her sister for a second, they were both standing and Ruby's head only came up to Yang's breasts, and her shoulders and hips were about half as wide, how could she be rough if her sweet little sister was so much smaller. "Oh well, she quite literally asked for it"

Yang grabbed Ruby's head and pushed her down on to her knees as the petite girl let out a surprised yelp. The blonde pushed just a couple inches into the leader's mouth, as she didn't want to go throat fucking her yet.

Ruby looked at the large cock in her mouth and saw that Yang wasn't pushing it nearly as far in as she could. She wasn't sure how people could fit such massive things like that into their mouths. All of a sudden her mouth was empty.

"How is it so far Ruby, it's good for me so far." Yang said.

"It's goo- mph" Ruby began as the cock filled her mouth, but the tip kept going, and in one smooth motion the entire cock disappeared into the petite girl's mouth. Ruby felt her gag reflex be set off, but it didn't matter because her entire throat was full. She shut her eyes as she felt the reflex, and her face slammed into Yang's pelvis. Her nose was right in her sister's short pubic hair, and with her throat completely filled she couldn't breathe at all. She felt her throat stretching and her eyes filling with thears but this was exactly what she wanted, to choke on Yang's cock.

Yang was in a pleasure filled paradise. Her strong arms kept Ruby's head all the way down and with each small struggle the girl put up the pleasure increased. Yang was a very caring sister and lover though, and there was no way she would let her little sister suffocate or even feel like she would, so she let go.

Ruby immediately began coughing. "Yang..." she said before continuing to cough "...keep going"

And with that, the sun dragon ferociously jammed the cock back in, and began thrusting, fucking the petite throat. She simply held the head in place, and used the throat like a pussy.

Ruby was making gagging and moaning noises with each thrust, pleasuring her wonderful sister.

The submissive girl looked up at the blonde towering above her. Those large breasts. That beautifully toned body. And those amazing lilac eyes looking down at her.

The brawler saw the shining silver eyes looking at her, and she loved seeing that face being fucked. Whenever there was a particularly hard thrust, the girl's eyes would shut for a second, and tears began going down her face from the gagging.

Yang was letting out ecstacy filled moans, as her head went back, enjoying the feeling of a tight throat around her thick cock.

Ruby on the other hand, was letting out gags and moans of both pleasure and slight pain, as her throat quickly became raw and sensitive. Each time the cock pulled out in between thrusts she had to do her breathing.

The silver eyed girl had tears streaming down her face, and both hands on Yang's hips. She realized that Yang might not stop anytime soon so she tried to push her hips away, but it was no use as her sister was way stronger than her and didn't even feel the push, when all of a sudden the petite girl felt her sister sheathe herself all the way. The young girl's face was pressed against the older girl's hips and her throat was completely full and she wanted desperately for Yang to stop, but she felt a big load of liquid shoot straight down her throat and the blonde quickly pulled out.

The next few minutes were nothing but gagging and coughing.

"I'm so sorry Ruby, I got carried away, I forgot you're new to this." The sun dragon explained.

The smaller girl looked at the dragon "it's okay… as long as you fuck me now"

"Wow, right back into it huh?" the blonde snickered.

Ruby stood all the way up "Please Yang, just fuck me" she said exhaustedly.

And so, dominantly the brawler placed her hands on the other girl's petite bottom, to pick her up and lower her onto her own cock while she stood straight up.

In this position, Yang stood, holding under Ruby's bottom, so that the smaller girl could bounce on the cock, without her feet touching the floor.

The sun dragon bounced her lover on the cock.

"Oooh… Yang… please… don't stop." Ruby moaned

"Oh don't worry" the older sister said grinning, "I won't"

And for an amazing, moaning filled minute, Yang bounced her sister on the black toy as the smaller sister sucked her siblings nipples in between moans.

Ruby came quickly, but was still ready for more.

The blonde was actually glad her sister had already cum, because holding her up and bouncing her was tiring. So she placed her sister on Weiss's bed, right in the perfect positions so she could have her way with her.

Ruby found herself face down, ass up on her teammate's bed. She knew what was about to come, and as she looked up, she saw in the mirror that Weiss of course has next to her bed, that Yang stood behind her guiding the penis in.

The brawler, without skipping a beat, began mercilessly pounding the girl beneath her.

When the red haired girl continued to watch the mirror she couldn't help but notice how much wider Yang's hips were than her own. Yang in general was just way bigger. She bent over Ruby, placing a hand on the top of the girl's head, holding it against the bed.

Each pound made Ruby move forward a bit, because the brawler was going hard. The petite ass was turning red from the impact of the dragon's pelvis against it with each thrust.

Yang thoroughly enjoyed the look of this small girl beneath her, with her ass in the air. She slapped the small bottom, careful to not make it too hard, but to at least make it sting.

Ruby let out a mix of a yelp and a moan as Yang continued to slap her ass as she fucked it. The small rose looked at the mirror once more. She realized that at this point she was just Yang's personal, breathing, fuck toy. And she loved that. She loved to look at Yang's body in the mirror. She loved looking at Yang's large body, her large breasts, wide hips, and beautiful face.

The rest of it became a blur for the girl getting fucked, since it was just unimaginable pleasure.

Yang had already made her sister cum several times but hadn't stopped, but now the blonde felt herself ready to cum, so with her last few thrusts, she grabbed one of her fuck toy's wrists, pulled it back so her face came off the bed and thrusted as hard as she could.

Ruby turned around to look at Yang as she came. She grabbed onto one of the strong arms that held her and watched the loving sister's face as she shot her load into her pussy.

As she continued to cum in her sister, Yang pulled Ruby's head up. Her large breasts were pressing against the back of the smaller girl's head. She hugged her sister tight. "I love you, Ruby." She said as she finished.