The next day while my sister is watching TV in the family room, I sneak into her room and adjust her blinds, leaving about an inch and a half gap between the bottom of the blind and the windowsill. After changing into my swimsuit, I head out toward the pool.
“Hey Lisa, I’m going in the pool. Want to go?” I ask my sister casually as I walk through the family room and out the sliding glass door.
“Sure, I’ll be there in a sec,” she says, getting up from the couch and turning off the TV.
That’s my cue. Around the house I go. I get to her window just in time to see her entering her bedroom. She is pulling her shirt up as she closes the door. I stand there mesmerized, as she tosses the shirt on her bed and begins taking off her bra. My cock jumps, creating a bulge in my swimsuit, when I get my first look at her teen sized mounds. I stare at them, enraptured by her inch and a half areolas and little pink nipples. But the real treat is watching her unzip her shorts and slide them down her tan legs.
My sister is average height, with a flat stomach, and a body that curves in all the right places. She turns from the window while taking her shorts off and I’m looking at her panty-clad ass, as she bends over. I start rubbing my cock through my swimsuit, to relieve some of the pressure, as she hooks her thumbs in the waistband of her panties and slides them down.
My god! Her ass is spectacular. Her firm, young cheeks curve just enough to make you want to grab a handful and plant kisses all over them. Bent over like that, a few blonde pubic hairs and just a hint of her pussy lips are visible between her legs. I can’t wait for her to turn around so I can see the rest of her. But, instead, as I’m admiring her ass, she slips her swimsuit bottom over her feet and pulls it up. I get one last peek at her ass, before she grabs the elastic on the sides of her suit and pulls them down to cover her cute round cheeks. Hooking her swimsuit top, she turns it around so the hook is in the back and the cups are in the front.
I belatedly notice that she’s standing in front of her dresser, which has a big mirror over it. Through the mirror, I get one more look at her nipple-tipped mounds as she slips her arms in the straps, pulls her swim suit top up over her chest, and reaches inside each cup to adjust her tits. She checks herself in the mirror and opens her bedroom door.
Shit! I better get in the pool fast. I’ve been so engrossed in watching her change that I didn’t think about what would happen if she saw me coming around the side of the house and I wasn’t even wet yet. Speaking of cumming around the side of the house; that was going to have to wait. I’m still hard as I hit the pool at a run and swim to the deep end, treading water, as she comes out of the house.
“How’s the water?”
“Great, come on in!” I yell, hoping the cool water will relieve me of my uncomfortable, and obvious condition.
We stay in the pool for about an hour, fooling around like we usually do. If my sister notices anything different, in the way I’m acting or looking at her, she doesn’t let on. I’m trying to act normal, but every time her tits get close to me, I can’t help but think about her pink nipples sticking out from her firm young breasts. When she sits on the edge of the pool, dangling her legs and pushing the water sideways with her foot, I stare at the crotch of her swimsuit, imagining how her pussy looks. Fortunately, I don’t have to imagine for very long.
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