She had an impulse

Rachel didn't know what came over her. It was almost like someone else had taken over her body. But she felt herself sit up straight and turn to look at Emily. She felt her hands reach out and grab Emily's waist, turning her sister to face her as well.

Emily raised an eyebrow and gave a half smile, not sure what was going on. "Rach, what ar-"

She was cut off as Rachel leaned forward and kissed Emily. Not a sisterly kiss on the cheek or a playful one on the nose. But a full-on kiss on the lips. Emily's eyes widened, completely confused at what was happening. But her hesitation allowed Rachel to keep going.

She pushed further forward and was able to get her tongue into Emily's mouth, wrapping it around her sister's. She could taste her sister's lips, those sweet lips that always had nice things to say about her. She let out a soft moan, her hands holding onto Emily firmly.

The moan was what broke Emily from her stupor. She quickly pulled back, unlocking their lips and letting a trail of saliva drip from her chin. "Rach, what are you doing!? That's so inappropriate!"

Instead of being surprised at her own actions, letting go and pulling away like she would've done in the past, this other version of herself just pouted cutely, looking into Emily's eyes. "But I wanted to thank you. Properly. You're always so kind and loving to me. You make me feel so happy. I couldn't help it, Em. I love you."

Emily blushed dark, looking down slightly to avoid eye contact. "I-I love you, too, but... we shouldn't be doing this. We're sisters."

Rachel reached up and cupped Emily's chin, making eye contact once again. "And? We're just kissing. Besides that, I wanted to do this for you. You don't get to go do anything for yourself and I know it's because of me. If I wasn't born, you'd be in college right now, enjoying life and making something more of yourself than just a girl who works at a grocery store."

Emily looked into Rachel's eyes, seeing real passion there. This wasn't a ploy or a game to her younger sister. This was real. Rachel loved Emily with her entire heart. She could see it clearly. "But, Rach..."

"Shh... just relax, sis. Let me take care of you." Rachel moved closer, their faces only an inch apart. She stopped there, looking at Emily pleadingly.

Emily knew her sister was waiting for permission. She could still pull away and leave, act like this never happened. She could go about her day without thinking about this at all.

But as she stared into her sister's eyes, she realized that she didn't want that. She wouldn't admit it out loud but she rather liked the way her sister kissed her. She'd never been in a relationship with anyone so she never knew what it was like. But the kiss felt so intimate and passionate. She wanted it. She wanted more.

She closed her eyes and extended her lips forward, opening her mouth slightly. That was all Rachel needed. The younger sister closed her eyes and kissed her sister once again. This time, both of them were enjoying it, moaing softly into each other's mouths.

First it started out soft and sensual. Rachel kissed her gently, her tongue pushing in and teasing Emily's. But it slowly became more. Her tongue pushed a little deeper, licking everywhere in her mouth. Then she felt Rachel's hands go from her hips to her wrists. She was slowly pushed backwards onto the bed, her hands pinned down next to her head. Emily was having trouble thinking at all. This was amazing.

But as Rachel pushed Emily down on the bed, something snapped in her mind. Her eyes opened and she pulled back quickly, shocked at what she was doing. She let go of her sister's wrists and jumped up from the bed, uncertain about what was going on.

Emily lay there, her eyes fluttering open slowly. She smiled up at her younger sister, biting her lip and rubbing her knees together. "Rachel... that was..."

Before she could finish, Rachel ran from the room and down the hall.