Shocked!

I spin round so fast that I almost completely topple over, slipping on the wet shower floor. I only just manage to hold myself up, and the motion still causes my rock-hard cock and heavy balls to swing and flick soapy water, recoiling back the other way before settling in front of me, pointing right at this new voice.

“Ya okay?” The mysterious and beautiful female intruder asks, giving me a sly smile.

She's much shorter than me, in a way I can't help but instinctually find cute, lap-sized, and invoking of my protective instincts. Her brunette hair is longer than my sister’s hair, down past her shoulders and hanging loose with a bit of bangs in her face. Beautiful green eyes distract from the adorable smattering of freckles across her cheeks and nose. She also has a killer body, curvy in the best ways. Wide hips, luscious thighs, plush booty, and her boobs are enormous... 36DD? DDD? G? I can't help but note that with her plain white low-cut camisole (with one strap hanging off her shapely shoulder in a way that seems attractively disheveled), it's obvious she's not wearing a bra. Erect pink nipples show through the thin cotton material and every slight movement causes undulations to her deep, visible cleavage in a way that causes my hard cock to twitch. Her midriff is bare just between her camisole and tiny pink miniskirt and has a cute bit of padding to it. Aside from these two articles of clothing, she doesn't seem to be wearing anything else. She's barefoot, no socks or stockings... I'm not even sure she's wearing panties?

“Wha... what? Who a- I?!” I stammer over the music.

With my raging boner pointing straight at her like an accusing finger, I nod slowly in response to her inquiry when my shocked and aroused stammering proves pure gibberish. Then I remember that I'm completely bare-ass naked in front of a girl I’ve never even met until now. I throw my hands down over my hard cock, moaning as I tried to press it flat against my stomach. It's a futile attempt to hide my current state that only serves to arouse me from the touch and prove that my boner and balls are too large to actually be capable of being hidden by only my two hands.

The girl, still smiling with a clear mischievous glint to her eye, turns and switches off the song. Turning back to me, she opens the shower stall door and steps inside in a clear invasion of my personal space. At first I think she's about to come onto me, but in an extremely ballsy power play, she switches off the water, and if I didn't know any better I'd swear she was giving me an eyeful of her jiggling cleavage during the act on purpose. Silence finally settles over the room and I note that this girl still hasn't left the shower stall, her body mere hair's breadth from touching my pulsating boner!

“Hi! Hee hee!” She giggles, beaming a sly smile up at me and giving me a jump and double wave, her ample bust giving a mighty heave from the action. “I’m Alice, Ashley’s friend!” She holds out her hand and I swear I think I see her briefly glance at my dick...

“I... I’m Jason... A-Ashley's brother” Still in a daze, I move one hand from covering my bare boner to shake her hand.

“I know who ya are!” She laughs and pulls her hand back just before we touch. “On second thought, I’m gonna let ya finish what you’re doing there first and let ya wash your hand before I shake it." She giggles, pointedly looking at my cock with no shame, now only held against my stomach by a single inadequate hand.

“What are you doing in here?” I finally ask, still standing stunned and exposed with cold water dripping off me and within hugging distance of this clothed girl.

“Oh, right! Ashley sent me. She forgot to tell ya that the bathroom lock is broken. Ya need to move something in front of the door to hold it closed. She almost got an eyeful of that glorious ass of yours walking by to tell me. She tried calling to ya, but I guess your music and the water was too loud? Or you were, hmmm... too lost in thought? Focusing on something else, huh?” She gives an evil grin, green eyes still locked on my naked erection and balls.

“It’s not... I wasn’t...” I try to explain

“You don’t need to explain!” She waves her hand dismissively, giggling. “Everyone does it, everyone’s got needs...”

A sensation of vulnerability and complete exposure washes over me as I feel her eyes like lasers scouring my naked body. Her attention is still disproportionately focused on my bare cock, held against my stomach with one hand and beating in time with my heartbeat with my heavy balls hanging under it. But then her eyes go wide, mouth hanging open a little in surprise. "That yours?” She asks, still sporting her wickedly mischievous grin.

I look down between my legs, directly below my ass, where my sister's butt plug is laying on the floor of the shower stall. Uhhh...