Stammer an answer,

“I... It wasn’t... I wasn’t...” I stammer out, my face burning red with embarrassment now.

She just stands with her arms crossed under her bust, giving her enormous boobs a noticeable lift. She's waiting, watching, smiling. She's clearly enjoying the show, her attention torn between my burning face and my throbbing nude cock.

“I-It’s not mine” I finally **** out. “I-I found it in here, I didn’t realize what it was and I dropped it when I did... honest!”

She pretends to be deep in thought for a moment, her arm squishing against her boobs as she brings her hand to her chin in mock introspection. She plays pretend at considering what I’m saying, then finally she bursts out laughing. It's actually really cute, especially when it makes those huge tits jiggle... "You’re so cute when you’re embarrassed, ya know that? It’s okay, Bambi!” she adds in a lower tone, her hand reaching up to pat consolingly at my bare, wet chest. Her touch causing my cock to lurch.

“B-Bambi?” I ask, bewildered.

“That’s right, Bambi!” She giggles. “Cause you’re young and new to this, just falling over yourself. I’ve got you like a deer in headlights, don’t I? Well don’t worry, I got a pretty unrestricted view of that ass when I came in. I’d be able to tell if there was something up there. Plus, I recognize your sister’s toy.” She winks at me and then turns to leave, finally stepping out of the shower stall.

On the way out, she spots my clothes on the toilet lid. “Oh, yeah! Your sis asked me to take your clothes out to be washed, by the way,” she explains. She bends over to gather up my clothes and I nearly **** on nothing when I get confirmation that she is, in fact, going commando. “Been great meeting you!” She winks at me as she leaves the bathroom and disappears around the corner.

“Fuuuck...” I moan, leaning back against the wall. I finally unhand my cock, letting the turgid member bouncing down in front of me. I'm still in a state of disbelief over what just happened... I've never had such a 10/10 girl that forward come onto me! I find myself smiling a little, though. The first of my sisters friends I meet and she walks in on me butt naked and erect. She seemed to have enjoyed it, though. And she seemed to like my penis and butt! Wait, but how does she know what my sister’s sex toys are?!