Public Nudity/Go get some towels as he asked
"Sure thing, I'll be right back."
Closing the door you move down the hall to the linen closet and fetched a stack of towels, thinking back to the times you've showered without realizing the towels were missing. Given your interests, you never bothered calling for help and would instead dart down the hall as quietly as possible is your family was home, or simply go about naked if alone.
Returning to the bathroom you enter and set the towels on the sink, close enough to the curtain where he could reach out and grab one without leaving the shower.
"Okay Kevin, I'll leave them right here on the counter."
"Tanks Claire, you're a lifesaver."
You were about to turn and leave when you look down at the large puddle of water and are struck with an idea. It was extremely risky, there was no doubt about that, but the funny feeling stirring in your loins compelled you onward. So with a smirk crossing your face, you grab a large towel from the stack and get to work cleaning up the water.
First you wipe away as much as you can from the edge of the tub. Once you have a sizable area dried off, you step into it, get on you knees, and lean forward to wipe up the rest of the floor. From this position not only was your ass up in the air, but your pussy was directly facing the shower curtain, and as you dried the floor around you and reached further your backside angled up into a better vantage point for someone looking down. You knew it was dangerous, that at any moment Keven could slide the curtain open and see your womanhood.
But that was the idea.
The thought of your brother seeing your intimate parts sent such a thrill through you there was no way you could ignore it. Glancing at the toilet you're reminded of the time you were particularly brave years ago and, when it was just the two of you at home, sneaked into the bathroom while Kevin was showering and masturbated right there with him none the wiser. It was so hard to hold in your moans at the time, and too this day you're still half convinced that he was jerking off himself in the shower at the same time you were. Just thinking about the possibility that you were both getting off right beside each other makes you want to move one hand lower and-
"Um, Claire?"
Your jolt in surprise as your heart stops.
You were so caught up in your fantasies that you failed to notice the water being turned off or the sound of the shower curtain being slid back. You spare a quick glace back, seeing your brother standing there with a towel around his waist staring down at you, his expression one of confusion.
Oh my god, he's actually looking! There's no way he can't see my vagina! Oh my god, how long was he standing there?!
Completely caught off guard, you hastily pull yourself up while stammering out an explanation. Sure you may have wanted this, but (and not for the first time either) you failed to account for what happens after your plans come to fruition.
"Kevin! Oh, I, uh, guess I forgot to say that I would clean up the water for you! My bad..."
As you stood upright and turned around, something you didn't plan happened. When you were one your hands and knees your towel must've come loose, as just when you came face-to-face with your older brother, the corner that was tucked against your breasts slipped free, and the whole thing fell open and peeled off your slim figure, pooling at your ankles. It was only good fortune that you managed to maintained an unchanged expression on your face, features remaining neutral as if you didn't just drop your towel in front of your brother.
Time seemed to stop for a moment as you both stood there, unsure what to do. You only had a split second to decide how to react, so you need to decide now.
What do you do?