Jen was turning seventeen in just under an hour, and she had been thinking, as usual in her late night 'swim,' about sex. Most of her friends had done it by now, and told her all about it, but she hadn't met anyone she felt comfortable with yet. A year ago she had sat in this very same place and promised herself she wouldn't be a virgin by the time she turned seventeen, and she smiled to herself as she once again made that promise to herself, with a one year extension. She dipped her head partially under the water, wetting her long brown hair, and rested her head against the side of the tub. She ran her hands up over her lithe, tan body, stopping to gently caress her breasts. Spreading her arms out over the edge, she closed her eyes.

"Jenny?"

Jen opened her eyes and sat up quickly upon hearing her name. Realizing her breasts were now slightly above the cover of the churning water, she sat back again. Someone had turned the porch light on, and she brought her hand up in front of her to block the unwelcome light from her darkness-adjusted eyes. She could just make out her younger sister Kelly standing a few feet back from the hot tub. "Turn that off Kelly," she said, "I can't see a thing."

"Oh, sorry," came the reply, and the light went dark. Jen shut her eyes tightly, trying to get rid of the swirling colors. Opening them, she saw Kelly move closer to the tub, standing just at the edge. Kelly was 14, three years younger than Jen, and the two usually got along very well, often having long conversations about boys, high school, and other topics Kelly was curious about. They were as much best friends as sisters. but the two looked remarkably similar. Kelly was a little shorter, her hair a little lighter, but other than that she looked almost the same as Jen had at that age. She was wearing a bright red robe, which she clutched tightly to avoid the slight chill in the night air.

"What are you doing out here?' asked Jen.

"I figured you'd still be up, and I wanted to wish you a happy birthday," replied Kelly. "You weren't in the TV room, and I saw the door to the porch was open, so I figured you were out here." She paused, looking around. "So happy birthday. It's 12:01."

"Thanks. I must have fallen asleep," Jen said. "I do that a lot when I'm out here,"

"Yeah. What are you doing out here, anyway?" Kelly asked, clutching her robe closer. "It's cold."

"I know," Jen smiled, "But the hot water feels even better when it's cold out. It's so relaxing, being out here under the stars, by yourself."

"You don't have any clothes on," Kelly observed.

Jen blushed slightly, smiling. "Yeah well, I don't know, it's more relaxing, kinda like a hot bath only better. Besides I didn't think anyone would see me." "Oh, I'm sorry," Kelly replied, "I can go back inside if you want."

"No, it's okay. Nothing you haven't seen before," said Jen. She smiled at Kelly and noticed she was shivering, shaking gently in the crisp air. "You're freezing, why don't you get in?"

"I'd have to go get my bathing suit. Might wake Mom and Dad," Kelly said. "Besides, you were relaxing by yourself."

"Don't worry about it. No one can see you, and I certainly don't care," Jen answered. "I could use the company, you can tell me all about your new boyfriend." "What? How do you know about Jason?" Kelly seemed slightly shocked.

"Heard you on the phone the other day," Jen replied. "Now get in here before you freeze to death." She sat up slightly and splashed some water at Kelly's bare feet.

Feeling how warm the water was in comparison to how very cold she was feeling at the time, any embarrassment Kelly was feeling faded rapidly. "Alright," she said, "Hang on."

Jen watched as Kelly stepped back and undid her robe, letting it fall to the ground. Beneath it she wore a long T-shirt emblazoned with the mascot from her junior high soccer team. She reached up beneath her shirt and pulled her white panties off, sliding them down over her smooth, muscular legs. She dropped them to the ground on top of her crumpled red robe. Shivering in the cold, Kelly reached down and grabbed the bottom of her shirt, pulling it quickly up and over her head. Jen found herself staring at her sister's naked body, silhouetted in the moonlight before her. Her athletic, teenage body was slightly more mature than Jen's had been at her age. She stood with her legs slightly apart as she slid the T-shirt off, and Jen noticed a light covering of hair over her perfect little slit. Her breasts were just beginning to grow, two small mounds of smooth flesh topped off by two tiny nipples, which were currently jutting out in the cold. She dropped the shirt and quickly made her way to the edge, where she dipped her toe into the steaming water.

"Wow," said Kelly, "Hot."

"Just get in. It'll feel great, I promise," said Jen. Kelly stepped into the water and slid herself down beneath the water across from her sister. Her eyes opened wide as the water flowed over her body. "See, told you."

Kelly slid down, wetting her hair. "My god, this is hot. Feels really good though." She said, leaning her head back against the side. "I could stay out here all night." She stretched her legs out and rested them on the seat across from her, just next to her sister. Jen did the same, and felt her sister's leg against hers. She spread her other leg slightly, allowing the warm flow of water from the vent to skim gently over her pussy. She tensed as the water caressed her clit. Smiling, she looked at her younger sister, sitting across from her. Her skin glistened in the moonlight, her little breasts just barely visible at the surface of the bubbling water. She was, Jen realized, quite beautiful.

"So tell me all about this Jason." Jen said, regaining her composure. "Is he in your class?"

"No, he's a year older. He used to have a girlfriend on the soccer team, and he'd come to all the games, which is where I met him. They broke up and then he asked me out. We've only been together for two weeks, no big deal."

"Did you kiss him yet?" Jen asked. She remembered her first kiss, at Kelly's age.

"No, but..." Kelly hesitated a moment.

"What?" Jen prompted.

"Well, we're going to a dance next Friday," Kelly answered, "And there's a party afterward."

"I see," said Jen, "You think he's going to go for it?" She smiled.

"Yeah," Said Kelly. "I don't know, I'm a little nervous, I guess. I've never kissed a guy before... that way, you know? I'm pretty sure he's done this before, I don't want to screw it up."

Jen laughed. "It's really not that big a deal. You'll do fine."

"I guess," Kelly smiled. "I've been practicing though."

"What?" asked Jen, slightly surprised. "With what?"

"Well," Kelly said, "You have to promise not to tell anyone."

"Promise," said Jen, "Who would I tell anyway?"

"Okay," Kelly began, "Last weekend when I had that sleepover at Dawn's house, we started talking about it..."

"And you practiced kissing with Dawn?" Jen asked.

"Yeah," Kelly said, "But she hadn't done it before either, so we weren't sure if we were doing it right."

"Did you like it?" Jen asked. She found herself getting more interested in her sister's story. Probably, she thought, because she hadn't so much as kissed anyone in the past eight months. The hot water rushing against her wasn't helping, either. She moved a hand down between her legs, certain Kelly couldn't see her, and began to rub gently at her pussy.

"I guess," replied Kelly, "Her tongue felt so soft in my mouth. Is that what it feels like with a boy?"

"No, they're usually rougher," Jen said, "More forceful."

It was now Kelly's turn to be curious. "Have you ever kissed another girl?" she asked.

"Sure," said Jen, "I did the same thing. I used to practice with Jessica."

"Oh." Said Kelly. She paused for a moment, moving her arms around in the water, splashing her shoulders. Her leg again rubbed against her sister's. "And you've kissed a lot of guys, huh?"

Jen smiled. "I wouldn't say a lot really, I think the total is up to five."

"So what do I do?" Kelly asked awkwardly, "I mean, you would know more than Dawn, right?"

"Yes," Jen replied, "I guess I would."

"So can you tell me what I should do?" asked Kelly.

Jen sat there, rubbing at her slit, the hot water gushing against her pussy, and decided to show her instead. She took her legs down and moved forward, kneeling on the seat around Kelly, straddling her. She held her sister's face in her hands and wiped a strand of wet hair from her forehead. Kelly looked up at her, smiling slightly. Jen tilted her head slightly, closed her eyes, and pressed her lips against her sister's mouth. Kelly's lips were soft and moist, something Jen had not tasted in a long time. For a few seconds she simply held her mouth there, enjoying the feel of her younger sister's breath against her, of her head in her hands. Then Jen opened her mouth, probing Kelly's lips open and slipping it inside. She swirled gently around inside her sister's mouth, feeling its warmth. Kelly soon returned the favor and Jen felt her little tongue darting gently in and out of her mouth. Jen was getting even more excited, thoughts running through her head about her sister she had never had, and yet seeing her beautiful young body, feeling her tongue inside her, she knew she wanted it more than anything. She pulled back. Kelly kept her eyes closed a few seconds longer, then opened them......(cont)