AN: Hey, y'all. Here's the first chapter of my new Beth x Ellie fanfic, A Sister-Sister Love Affair. I really did have a lot of fucking fun writing it. I really hope y'all will love enjoy reading it.

And now on with the story.

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xxx-Beth and Ellie's Apartment-Los Angeles, California-xxx

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It was really late at night, almost two in the morning and Beth was laying in bed as she tried to sleep, but no matter what she did, she was wide awake. She glanced down her body to see her dick was tenting her blanket and she let out a frustrated sigh. Beth realized she was both tired and really fucking horny. She needed her older sister and girlfriend, Ellie to help her out. Beth looked to her side to see that her sister wasn't in bed with her.

Ten minutes later, Beth got out of her bed and padded her way to the bathroom to pee. She then decided to see if Ellie was awake, so she walked to Ellie's office and to Beth's surprise,the light in the office was turned on. And there was Ellie sitting in her desk chair and writing on her PC.

"Hey, Ellie. I noticed you weren't in bed with me. Is something wrong." Beth said. She sat down in another chair which was nearby. Beth did her best to hide her erection from Ellie, at least for the moment anyway. She wasn't embarrassed about getting hard, she just didn't want it to seem like she was in a rush to fuck or anything like that.

"Hi, Beth. Yeah, well, I couldn't sleep. So I decided to get some writing done. I think I know why you're still up though. I'll finish writing this chapter, then I will help you out." Ellie replied. She gave her sister a once over and she noticed how red Beth's face, not to mention the fact that Beth had her hands in her lap. Ellie smirked as she had already figured out the reason why Beth came to her in the first place.

"Cool. I'm just really horny, sis. I can wait though." Beth replied. She didn't mind waiting, she just had no idea how much longer she could wait until Ellie was finished with whatever she was doing. Beth could swear she almost felt the heat coming from Ellie, even though they were both fully dressed and several feet away from each other. She was pretty sure of that was because of how in tune with each other they were despite that Ellie was ten years older than she was.

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xxx-Twenty Minutes Later-xxx

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Ellie got out of her desk chair, walked over to Beth and straddled her lap. She placed her arms on her younger sister's neck, she leaned forward to kiss her and it was like a spark of electricity went through Beth's lips to her own. Ellie let out a soft groan when she felt Beth's dick grind against her pussy through her clothes.

"Fuck, Bethy-boo. I can feel how hard your cock is. I can't believe it's all because of me." Ellie said. She both heard and felt Beth chuckle. Ellie had trouble not tearing off her and Beth's clothes right then and there, but she knew that their bed would be far more comfortable.

"Yeah, Ellie. It's all for you. Nobody else has ever made me this fucking horny before, only you." Beth replied. She quickly stood up and Ellie wrapped her legs around her waist. Beth kept kissing Ellie as she carried her to their bedroom.

Ellie giggled when Beth gently dropped her on the bed. She whined as Beth took off her shirt and bra before licking and sucking at her nipples. She pawed at her sister's clothes and within a few minutes, both of them wore only their underwear. As the heat between them intensified, Beth slid her hand into Ellie's panties, feeling the wetness that awaited her. She rubbed Ellie's clit in slow circles, relishing in the way her sister's hips bucked against her hand.

"Mmm, Beth, that feels so fucking good. But I want your cock inside me. I need it, baby." Ellie moaned. Her voiced dripped with desire as she wanted nothing more than to be filled by her baby sister's dick.

Beth couldn't resist the plea in Ellie's voice. She hooked her fingers into Ellie's panties and slid them down, revealing the glistening folds of her girlfriend's pussy. Beth positioned herself between Ellie's legs, her dick throbbing with anticipation. Beth plunged her cock into Ellie's pussy without hesitation, the slick walls of her pussy enveloping her shaft. She smiled when Ellie gasped and arched her back, her hands gripping the sheets as Beth began to thrust into her.

Beth and Ellie's bodies moved in perfect sync, a rhythmic dance of pleasure and desire. Beth's balls slapped against Ellie's ass with each powerful thrust, the sound echoing through the room. The intensity of their connection only fueled their lust, pushing them both closer to the edge.

"Oh, fuck, Beth! Harder! Deeper! I want to feel you deep inside me. Don't hold back!" Ellie moaned. Her voice was a mix of pleasure and desperation. She loved how Beth fucked her, it felt so damn good.

Beth obliged, her hips pistoning faster and harder, her own moans mixing with Ellie's. The bed creaked beneath them, a symphony of their passion as they lost themselves in the throes of ecstasy. The two sisters moved in perfect harmony, their desires merged into one. Beth's thrusts became more primal, her need for release was overwhelming. She gripped Ellie's thighs, holding her in place as she pounded her thick cock into her with all her might.

While the waves of pleasure crashed over them, Beth felt the tension building within her, a familiar heat spreading through her body. She could tell Ellie was as close as she was to coming too and her moans were growing louder, her grip on Beth's shoulders tightening.

Beth and Ellie reached their peak in one final, explosive moment. Their bodies convulsed, pleasure coursing through every nerve ending. Beth's dick throbbed as she released her hot load deep inside Ellie, their cries of ecstasy filling the room. They collapsed onto the bed, their bodies still intertwined, their breathing heavy and labored. Beth kissed Ellie softly, their lips lingering in the afterglow of their passion.

"Fuck, Ellie. You always know how to make me feel so fucking amazing." Beth whispered. Her voice filled with love and satisfaction for her sister. She loved Ellie so fucking much.

"And you always know how to fuck me senseless, Bethy-boo." Ellie said. She grinned, her eyes sparkled with adoration. Ellie cuddled into Beth's arms and she rested her head on her sister's chest.

As they laid there, basking in the warmth of their connection, Beth couldn't help but feel grateful for the intense desire that fueled their relationship. They were two souls bound by a love that transcended societal norms, and in that moment, they were exactly where they were meant to be.

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AN2: And that's the end of the first chapter of A Sister-Sister Love Affair. I hope that y'all loved and enjoyed reading it. I have the second chapter written and publsihed soon.

I promise that I will get back to writing my other current fanfics. Thank all of y'all for reading, reviewing, favoriting, and following all of my fanfics. As always please read and review. Until next time.