Bored Little Girl/Pool
"Okay!" replies Jackie, shamelessly pulling her dress up and over her head as she bounds excitedly over to the closet where she keeps her bathing suits. Now wearing only her white panties, she exposed her preteen chest to you fully. You had seen you sister naked before, of course, but not since the changes from puberty had begun to start. As you admire the slight domes of her breasts, each crowned with a puffy pink areola and nipple, you wonder for a moment if she's doing this to tease you on purpose. But then you realize, no, it's much more like your sister to just not notice the effect that showing her developing body would have on people. That, and she probably wasn't too worried about her nine-year-old sister lusting over her.
Jackie now had her back to you as she rifled through a set of small drawers in her closet, hiding her breasts but giving you a nice view of her panty-clad bum, which had also started to grow in recent years. As much as you want to stay and watch your sister until she took off her bottoms, you decide it would probably be better for the whole "trying not to freak her out" thing if you went and got changed into your swimsuit as well.
You get back to your room and pull down your shorts, causing a string of clear, sticky juice to stretch between the crotch of your shorts and the soaked gusset of your panties, only breaking off when your shorts hit the floor. You quietly giggle to yourself and play with the dangling drop of juice left hanging from your panty-covered pussy lips, moving your hips side to side and watching it swing back and forth, swinging it farther and farther until it sticks to one of your legs.
Smiling, you grab a tissue and wipe the dripping wetness off your legs and the outside of your panties, then another to wipe your bare pussy after dropping your drenched panties to the floor, on top of your shorts. Then you step out of both and toss your shirt onto the pile of clothes. It's time to pick what you're going to wear to the pool!