Bored Little Girl/Pool1a

You grab a dark purple one-piece suit. For a while this had been your favourite bathing suit, but you haven't worn it since your mom finally let you have a trendy bikini. However, since you'd only be swimming in your back yard, you decide that today you want to wear this one again for a change. You pull it up over your shoulders, and it becomes quite evident that you've grown since the last time you wore it. It was normally a very modest suit, but now just standing up straight made the bottom pull tight against your pussy, and with the slick dampness between your lips lubricating it, it slipped easily between your outer lips, putting an arousing pressure on your clit and inner labia.

You take a quick look at yourself in the mirror and giggle at how your frontal wedgie just draws attention to your privates. You also notice your nipples have gotten hard and can be seen through the worn fabric of your older swimming suit. You smile devilishly and run down the stairs and out the back door to your pool. The whole way, you can feel the tight-stretched fabric between your legs sawing deeper and deeper into your crack.

Jackie is already there, putting one leg up on a deck chair to apply sunscreen. She chose to wear a light yellow bikini with tied sides. The tiny triangle at the back offered a great view of that fascinating butt, and you can faintly make out the outline of her puffy areolae through the thin fabric of the top. Your pussy has already started to make a mess of your wedged gusset in the time it took you to get down here, and seeing so much of your sister's body was only encouraging your libido all the more.

"Wow, sis!" exclaims your Jackie when she sees what you're wearing. You can tell her eyes are focused especially on your exposed cunny lips. "Isn't that suit a bit small?"

"A little, I guess," you reply, slipping a finger into one of the leg holes and pulling the fabric out as much as possible. Brushing your finger against your crack feels very good. You quickly get into the pool before your pussy juice starts dripping down your legs and reveals how aroused you are. "But it was the first one I grabbed and I just wanted to get in the pool quickly. It's fine."

"But isn't it uncomfortable how it's pulled up into your... y'know?" Jackie smiled awkwardly as she pointed her index fingers downwards, too embarrassed to talk about her sister's vulva directly but still curious enough that she had to ask.

With your aroused girly bits now hidden below the water, you gently slide a finger between your lips and over the fabric squished between them. You can feel your hardened clit poking through. "No. I actually think it feels kinda nice," you say, smiling innocently.

"Really..." replies your sister inquisitively. She pauses, as if lost in a daydream, but says no more. She walks across the deck to the pool shed, retrieving an old boombox to plug her phone into.

Meanwhile, you wade your way along the wall of the pool to the reason you wanted to come out here in the first place; as you pass your aching pussy in front of the flowing return jet, a wave of pleasure washes over you. You let yourself moan, knowing your sister is out of earshot in the shed.

You had discovered masturbating with the pool jets a couple years ago. At first, pointing the jet between your legs was just something that felt good, and you did it from time to time whenever you were swimming with your family or friends, but never for more than a few moments at a time. But as you experimented with it more, you found out how to tease yourself with it and build up pleasure until you reached a wonderful climax. You put that experience to work now, slowly swaying your hips back and forth in front of the jet, letting the flowing water pass over your swollen labia. You close your eyes and want to make yourself cum right away, but the bang of the shed door alerts you that your sister is back out on the deck.

You compose yourself and casually paddle across the pool as your sister grabs her phone and fiddles with the speakers. Your lips are so swollen and sensitive from your tightly bound crotch that just paddling your legs is bringing you closer to orgasm. By the time you reach the other side of the pool you have to stop or you'll lose complete control in front of your sister. You hold onto the wall of the pool, waiting for your breathing to slow back down. Luckily, you sister isn't paying attention to you, searching for the song she wanted: the latest boy band craze. Of all the changes that adolescence had brought to her in recent months, her obsession over twenty-something boys wasn't something you understand. Never the less, you enjoy watching her badly dance her way to the pool stairs.

Jackie quickly submerges after walking down the stairs and comes up right next to you. You wince as water suddenly splashes your face and, for a moment, you focus on splashing your sister back, briefly forgetting about bringing yourself to orgasm. The two of you tussle in the water for a bit, but before too long Jackie loses interest in the childish game and drifts in lazy laps around the pool. You wish you could just set up in front of a jet and cum at this point, but your sister would definitely notice, so for the moment you just circle the pool like your sister. However, with each jet you pass, you inch closer to orgasm. The slow build is torture. Eventually...

• ...Jackie climbs out of the pool to recline on a deck chair.
• ...the wait becomes too much and you say fuck it, I'll masturbate with her in the pool.