This is my first fanfic ever, so I hope it's somewhat good. I'll be adding chapters later, so don't worry! I welcome critique, but please be gentle because I'm so nervous and scared about sharing. Thanks so much and I hope you enjoy!

Riley closed her laptop and took a deep breath. While she liked being in college and having all her classes online, it seemed to tire her out more. She stood up and stretched. She was only wearing a long shirt and panties, so she wouldn't show off a lot. Then she remembered her parents were still on their little trip to some local bed and breakfast.

Auggie was home, too, and she wondered what her little brother was up to. She sent him a text message asking him. Then realizing how lazy she was being, she figured she should just go ask. When she opened her bedroom door, there was Auggie, ready to knock. It startled her, making her drop her phone.

"Sorry, Auggie! I was just coming to find you."

"Yeah, I saw, and I figured I'd just come in. Lemme get your phone." He bent over to get her phone. As he stood up, she noticed he took more than a quick glance at her legs. "Um… h-here's your phone, Riley."

"Thanks, sweetie," she said, ruffling his hair a bit. Although he was almost 13, she still thought of him as her baby brother. He was almost as tall as her, but maybe she was just short. Riley took her phone from him as he stood there quietly. "Aug… something on your mind?" He looked at her, then to the floor, then back up. Riley put her hands on his shoulders. "Mom and Dad won't be back until late next week. Whatever it is, I can help."

He sort of half smiled. "This isn't really something I'd ask them." He pointed the chair at her desk next to her bed. "Can I sit down, Ry?"

She nodded. "You're worrying me. How serious is this?"

As Auggie sat down, he said, "No, no, not that serious. Or, well… no, not serious. Don't worry."

She just said OK, smiled, and sat on her bed. Again, she caught him checking out her legs. Sometimes she forgot her baby brother wasn't a baby anymore. "You know you can talk to me about anything, right? Even the… y'know, embarrassing stuff."

Auggie nodded and looked down. He took a deep breath. Looking up, he asked, "Ry, am I ugly?"

"Um, no, you're not. What— why would you ask that?"

"No, I mean, like, if I wasn't your little brother."

She shook her head. "Auggie, you're not ugly. You're cute as hell. You're a very handsome boy."

"Then why won't any girls kiss me?"

Now she was confused. He and Ava had split up a long time ago, but still! "I thought you and Ava would've kissed. And other stuff."

"No, she just gave me little kisses. Like Mom does. Not a real kiss." He got up and paced a little. "I mean, I have girls as friends, but… they…. Maybe I'm ugly."

Riley patted next to herself on the bed. "Come here. Sit." He did, and she put her arm around him. At least her big sister power could still calm him. "Now, first, don't ever say you're ugly. K? You know we don't think you are. And even though Mom and I say so, girls you aren't related to say so. Even Maya says so. And Smackle."

"Yeah, but why don't pretty girls like Maya, Smackle, and you ever like me?"

Riley's mind reeled for a second. "You think I'm pretty, too?"

"Well, yeah. You're beautiful, Riley. You and Maya have always been so beautiful."

"Awh, thanks. Anyway, girls are shy at your age, too. They're just as nervous and shy and scared as you and the other boys."

Auggie nodded and sighed. "I just want my first kiss to be special. With someone who likes me. And won't laugh because I don't know what I'm doing."

As Riley rubbed his back, something popped into her head. "Um, Aug, I got an idea. You… you want your first kiss be with me?" He looked at her, his eyes wide. "Think about it. You said with someone who likes you. I love you. I won't laugh. I'll help you, and let you practice."

"You don't think that's a little weird, Ry?"

"It's not how most would do it. But when we've kissed a few times, maybe Maya could help."

Auggie's eyes were still wide. He blinked a few times. "Wait, this isn't what I was asking for."

"If you don't wanna—"

"I'm not saying no, but are you sure you want to, Riley?"

She giggled a little. "It was my idea. Besides, I saw you looking at my legs. You like me maybe a little more than just as your sister."

Auggie blushed. "Yeah, but… y-you know…"

Riley giggled and kissed him on the cheek. "It's OK, sweetie. I don't mind. I actually like it. Now, scoot a little closer." He did as she told him. Riley could feel her legs up against his soft flannel pajama bottoms. She took his arm closer to her and put it on her hip, very close to the bottom of her shirt. "Now put your hand on my neck. Gently." He did, and she could hear his breathing quicken.

"Auggie, sweetie, take a deep breath. Calm down, k?" He nodded and did so. She looked into his soft brown eyes. She lifted her hand to his curly hair and stroked his head. "My gorgeous little brother, growing up so fast."

"Riley? Thanks for this. I love you so much."

"I love you, too. You ready?" He nodded. "Rub my cheek and neck softly. Oh, yeah, that feels really good." She leaned forward. She could feel his warm breath on her face. Parting her lips, she pressed them to his. He opened his lips slightly, and then they started kissing. Riley could feel heat spread from their lips down her body. Auggie had such soft lips she couldn't hold back from kissing him.

Riley felt his hand move from her neck to her hip. Him holding her hips felt so good. Then he pulled her closer while kissing her harder. That's it, Auggie, take charge, she thought, catching herself moaning aloud. She moved back a bit, aching she broke the kiss. She had trouble catching her breath, but she managed to say, "Now… kiss my neck, too." Like a good student, he started kissing her there. He started from her shoulder and softly kissed her up to her earlobe.

She had to admit she was loving this. Her nipples were pressing against her shirt. A part of her was embarrassed her pussy was tingling and wet. Riley was sure her panties were soaked. Why am I enjoying this? Why does this feel so good? She knew she should fight it, but she didn't really want to. Nor did she fight it when she felt his hand cupping her breast. She gasped at this new delight.

But Auggie jumped back. "Oh, crap, I'm so sorry, Riley! I didn't meant to do that!"

Still panting, she smiled. "Don't you dare apologize." She took his hand and put it back where it was.

"You don't mind?"

"Not one bit, sweetie." She looked down at the bulge in his pajamas. Through the fabric, she could see his throbbing erection. Riley could feel herself getting wetter by the second. Every time she moved, her panties rubbed her pussy lips, making her ache to do more. She stood up in front of her brother, now seeing him as more than just her baby brother. She had to admit to herself he was a sexy guy. Even without asking, she knew they both wanted more than just kissing right now.

Riley grabbed the bottom of her shirt and pulled it completely off, dropping it to the floor. Now she was wearing only her red lacy panties in front of Auggie. He looked at her body up and down, seemingly taking every inch carefully. She'd never felt sexier than this moment. "Do you like my body, Auggie?"

He nodded. "You're so sexy, Riley. I knew you were beautiful, but I only imagined how sexy you are."

"You've imagined me like this?"

He nodded his head. "I've thought about you and Maya so many times. Mostly you. But you're even better in real life."

Riley put her fingers in his soft, dark hair. She took a step forward, making him open his legs. She noticed his cock was still throbbing and it made her feel so excited. He truly enjoyed what he saw. She took his hands and put them on her tits. Gasping at his soft hands, she smiled. "Auggie, baby, do you like them?" He nodded again, probably trying to find the right words. "My little brother is growing up fast. And growing in his pants. Oh, don't blush, sweetie. Today we're going to do more than kiss."

Auggie wondered what could possibly be next…