My phone buzzed again and I felt another rush of excitement, a Pavlovian response in my pussy. “Pull the top down and give them a little peek. Just your tits. They’re so big they’re basically out already, right?”

I froze, staring at my phone. My heart pounded at the thought. Caitlin was right though; the bikini was barely keeping me covered as it was. But pulling the top down would leave me completely exposed. Across the street, the group of men were still chatting and laughing, but one of them had shifted closer to the window. I glanced back at Caitlin’s message and bit my lip.

“I don’t know, Caitlin,” I typed back. “That’s a lot.”

Her response came immediately.

“You’ve come this far, Sarah. Don’t chicken out now. It’s just a flash. Quick and easy. No one will even notice.”

Looking at the men across the street, I wasn’t sure that was true. But the excitement was undeniable. My hands trembled as I reached for the thin string behind my back, the fabric digging lightly into my flushed skin. Slowly, I pulled at it, feeling a release of pressure and letting it fall loose. The two tiny triangles at the front were so tight that they continued to hug my hard nipples.

I glanced over at the hotel. The married couple was still in their room, the woman now standing by the window, looking out as she sipped a drink. My cheeks burned as I wondered if she could see me, wondered if her eyes traced the shape of my newly exposed breasts.

“Do it,” Caitlin texted again. “Show me.”

I read the text over and over and felt myself flush. Fuck. Why did it turn me on so much?

I cupped my breasts, leaning forward slightly as I angled myself just enough to give everyone a good, clear, slutty view, just like Caitlin wanted me too. I closed my and in one quick movement whipped the rest of the bikini up over my head, letting it drop to the floor.

That's it, I thought. There’s no turning back now. My tits are out.

The night air felt maddening against my bare skin, and I could feel my heart pounding in my chest, my large breasts looking obscene in this public space. I took a quick selfie. My tits filled the frame, my nipples hard and flushed, the faint light from the balcony casting a warm glow over my skin.

I hit send.

“Perfect,” Caitlin replied. “Now let them see you for real. Step closer to the railing.”

I swallowed hard, taking a shaky step forward until I was right at the edge of the balcony. The cold metal pressed against my thighs as I leaned forward slightly, my arms at my sides, completely exposed to the windows across the way.

“Someone’s looking,” I typed, my fingers trembling. “Can I put them away yet?”

A man in the group of drinkers glanced up, his head tilting slightly as if he were trying to figure out if he was really seeing what he thought he was. My stomach churned, my thighs squeezing together as a rush of adrenaline and arousal swept through me. The woman in the robe had moved closer to her window too, her drink still in hand. I pretended to stare at my phone, to not notice I was being observed, but my cheeks burned hotter as I realized how obvious it was that she was watching.

“No,” Caitlin messaged. “In fact, just for asking, I think you should play with them a little, don't you?”

“Play with what?” I asked, but I already knew.

“Your nipples, Sarah. Don’t act coy with me. I know they are hard right now. They are craving attention, right?”

Fuck. She knew me so well. Without further hesitation–guided partly by her words, partly by my body's own desires–my hands slowly moved up to my breasts. My fingers trembled as they brushed against my nipples, already stiff from the cool air and the tension coursing through me. They flicked back into position and I gasped softly into the quiet night.

I was starting to get really turned on now. Needy, even. I cupped my breasts fully, feeling their weight in my hands as I kneaded them gently, my thumbs grazing over my nipples again with each squeeze. The sensation was maddening, the combination of my arousal and the forbidden nature of this act pushing me further than I ever thought I’d go.

“I bet you’re doing it, aren't you?,” Caitlin texted. “Good girl. I told you you were a slut. Now turn around and bend over. Let’s really give them a real show.”