NOTE: All characters are 18+, and fictional. Any similarities to actual people is purely coincidental.
This is the third part of the Role Playing Games story. I'd recommend starting from the beginning.
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Kiki and Chris dated for a while, and he helped to contribute to her transformation. Her sweet, innocent appearance with lovely red hair, petite figure, and big blue eyes belied her ravenous sexual appetite, which he fed regularly. As long as he made it some sort of roleplay, she went along with whatever challenge he could think up. And while sex with Kiki alone was great, he found what really turned her on was when Clay joined in. He let others use her too, but Clay was always her favorite.
She had also discovered porn, and found it terribly exciting. They would sneak off to the attic above the garage at Chris's place with a laptop and find videos she liked. Her favorite, to no surprise at all, were threesomes and gang bangs.
As a treat for her, they took her out of town to an adult movie theater, and spent most of the time playing with her while she gave them both a hand job. Then Clay told her to stay put, got Chris to follow, and they sent two older guys to sit with her and get the same treatment. That night they took her to the motel, just the three of them, and fucked her until they were both spent, and still she wanted more. The girl was becoming insatiable.
Their Thursday night motel roleplaying game became a regular event. She would get dressed up in a miniskirt, a loose muscle shirt, and cover it with something less obvious to meet Clay and the guys down the block. They'd take her to the motel for a few hours and resume the game just long enough to get Kikidra the Slut/Thief into a compromising position. Then they'd fuck her together or in turns until they had to leave.
To top off her exciting summer, she got the best news ever. She received acceptance to her first choice school. The best part about it was the location. It was less than an hour to Clay's campus! She rushed into his room to tell Clay about it, and he quickly covered up! He'd been looking at something on his laptop and jerking off with the door unlocked?
"What! Why don't you knock?" he growled at her.
She got a coy smile, slipped into his room, and quickly shut the door and locked it. "Sorry, big brother. I didn't know you were busy." Her smile was infectious, lifting on her toes as if to see over the pillow he was using to cover his exposed cock. "Need any help?"
"You're crazy," he shouted back in a loud whisper. "Mom and dad are downstairs."
She nodded, quickly came over and sat beside him on his bed. "I know, right?" He tried to move his laptop and shut the lid, but she got to it first and got a look at what he was whacking off to.
"That's... That's me!" And it was. She had her legs held up in the air with Clay driving his cock into her while Cris fed her his cum, shooting gobs onto her face and glasses. It was obvious this was after the other guys had as well, since her entire face and nearly every inch of her glasses were covered in wet streaks.
"Who took this video?" she demanded meekly.
"Well, I did. Sort of. I let Andy use my phone and..."
Kiki reached a hand under the pillow and took hold of his thick meat, tugging on him the way he liked. "Oh, look at me!" she moaned. "I'm going to cum! Wow! You really fucked me so hard!"
Clay groaned from her eager stroking, but looked a bit concerned. "You're not mad?"
"Are you kidding?" she panted. "I love it! Do you have any more?"
Surprised, but pleasantly so, Clay turned his laptop toward him, selected another, and started it. "One of my favorites," he said.
Kiki was on top of Chris, riding him and bouncing her cute little ass wonderfully. Then Clay came into the frame, got up behind her, and shoved her down onto Chris's chest as he lined up his cock with her ass.
"Oh, God!" Kiki groaned. "You're both going to fuck me! Oh, Clay! You're going to fuck my ass! That's so sexy!" The moment Clay's cock in the video sank into her ass, Kiki's hand froze in mid stroke, and she shuddered, convulsing the way she does when having an orgasm.
"Holy shit, Kiki?" Clay chuckled. "Did you just cum?"
She panted softly, her eyes still on the screen, and she leaned over quickly to kiss her brother deep and slow. "Yes," she purred. "Oh, Clay. Make more of these. I want to watch you fuck me from all angles. Oh, my god! Look! You're about to cum in my ass!"
Still watching, Kiki dove onto Clay's cock, swallowing most of his thick length in one gulp. She bobbed and sucked, just the way he liked it, her eyes still on the video. Clay switched to another of her on her back, feet in the air, Clay on top, banging her hard and fast. For a second, the camera panned away to Chris's face. He said, "My girlfriend is such a slut. Look at her getting fucked by her own brother!"
"Mmm, yeah," she purred. "I love it when my big brother fucks me." Back to sucking on Clay's thick length, she eagerly swirled her tongue around the head, still pumping him with one hand to get him to cum while they watched her being used on the screen.
"You're the best cock sucking slut I've ever known," Clay panted.
Kiki smiled and gave his cock a kiss. "I love being your slutty cock sucking girlfriend. And that's why I'm here! I have some good news."
Clay groaned, placing her hand back on his cock as she giggled and resumed pumping him.
"What's good news?"
"I got accepted!" she beamed a smile at him. "My first choice school! I looked it up on the map. We'll just be 50 minutes by car. I could even take a train into the city, and then another to just outside your campus. Two hours if you can pick me up..."
"What are you talking about?" Clay squinted at her. "You want to visit me on campus?"
She nodded eagerly. "Think about it! I could be your slutty girlfriend from back home. Nobody has to know I'm your sister! Then I could spend the entire night with you. The entire weekend! We could have sex and go to sleep, and I'll wake you up with a blowjob in the morning. We'll be like a real boyfriend and girlfriend!"
"But what if I have an actual girlfriend?"
Kiki sagged. "Oh. I hadn't thought of that. Well, then you can visit me at my campus."
"And you might have a boyfriend."
She shrugged. "We can work it out, somehow. Just think of it! We wouldn't have to hide it like here." As she spoke, Clay's hard cock jumped while she lightly stroked his shaft just the way he instructed her to. "You would like a slutty girlfriend to visit you, right?"
"Shit!" Clay groaned. "You're so nuts." He fell back on his elbows, humping his hips in time with her hand-job.
"Do you want me to visit and do this all night?" she teased.
"No!" he growled. "I want you to do this!" He reached over, grabbed a handful of her hair, and pushed her mouth down onto his aching cock
Kiki loved being manhandled by Clay like that. Her lips opened wide, and she gulped him in with a sweet whimper she knew he enjoyed. Then she held on while he took over and fucked her mouth like a madman.
The wet, squelching sounds of his head going down her throat were so sexy. Clay loved making her deep throat him. She had trouble taking his full length, but he was sure she was getting better at it. She just needed to be trained like a proper slut. Her bright blue eyes were tearing up at him as she strained, trying not to gag while he rammed his length deeper still.