>You head upstairs and happen to catch your sister Rainbow closing the door to your room
>She notices you and jumps slightly, before smiling
>"Hey Anon! I just got back from my run and was just about to hit the shower!"
>You smirk
"Don't push yourself too hard, Dash. I don't want to have to drag you back home because you passed out in the middle of the street."
>She rolls her eyes
>"Just because you can't run more than fifteen feet without desperately gasping for air doesn't mean the rest of us are as frail as you. I've gotta get you out there and whip you into shape."
>You chuckle
"Not in a million years."
>She heads into the bathroom as you enter your bedroom
>And lock the door behind you
>Your heart is racing as you reach over and peek under your pillow
>A pair of sightly-damp, sweaty panties
>You grab them as you lay back on your bed and undo your pants
>Before you free your cock, you reach into the drawer in your nightstand and retrieve some items:
>A condom, an SD card, and a blue Fleshlight and lube
>You didn't pick the color; it was a gift from someone special
>You pop the card into your phone, open the folder labeled '~Just For You~', and begin perusing the lewd images within
>The photos are all taken from the neck down, so this could be any tight, young, athletic girl that you're about to masturbate to
>You bring the panties up to your face and inhale deeply
>The smell is potent and wonderful
>You fish out your erect dick, roll a condom down your length, lube up, and bury yourself into your Dashlight
>You let the panties lay across your face to free up your hand to scroll through the images and videos on the device
>After pumping away at yourself for a few minutes, you explode, filling up the condom to near bursting
>It's been a while since you've produced a load this huge
>You pull the toy off of yourself and store it away to be cleaned later.
>Carefully you remove the condom as to not lose a single drop, and you tie it off

>You put your cock away, stick the SD card in the back of the drawer next to your Fleshlight, and grab the panties
>You check to make sure the hallway is clear before heading to Dash's room
>You toss the panties into her hamper, lift her pillow up, and lay the filled condom beneath before laying it back down
>She kept 'pranking' you by leaving her dirty underwear in your room, so you always 'prank' her right back by leaving her some of your baby batter
>Its the same prank you've been pulling on each other every week for the past three months
>As you leave to return to your room, you freeze as you pass by the bathroom
>You can still hear the water running
>Dash takes pretty long showers
>You stare at the doorknob for a moment as a voice in the back of your head tells you to just drop the pretense and go in there
>You push those thoughts out of your mind and force a laugh
>G-geez, your mind goes to some pretty weird places sometimes!