There was something special in that water gun.

So there I was, just enjoying the water. I was trying not to let Gina get my goat like she always does. Despite being (technically) older than Tina, she was just so immature. Everyday, she'd say some stupid thing or tease me about how much I was crushing on Tina.

...she wasn't wrong, but I was never going to say that out loud. To be fair, as I've said, they both were almost identical. The only difference was that Tina was in a blue bikini and was currently sunbathing like a beautiful swimsuit model while Gina was in a red bikini and currently giggling right at me as she held a scrap of blue fabric.

"What the hell is she laughing at this time?", I thought to myself as she took every chance to make fun of me.

I waded towards her watching as her eyes went wide. She was looking down at something as I got up to her. She was uncharacteristically quiet as I decided to just put my foot down.

"Look, I don't know what you have against me but could you stop it. I just wanted to spend some time with Tina and I'm not about to let you ruin it."

She didn't respond. She just kept looking down and snickering. I tried to look tough but she still didn't say anything.

"Are you listening to me? ...hello? Anything?"

Finally she piped up. "I take it the pool is cold? Hehehe~"

My eyes went wide. Why would she ask that question while look down towards my crotch?

...No. That can't mean what I thought it meant. Slowly I looked down and I saw my swim trunks, in pieces, floating in the pool!

I crossed my legs and looked around. Thankfully Tina didn't notice but Gina was wiggling her pinky as she smiled that horribly smug smile of hers.

"Did you like the fabric dissolving solution I put into my water gun? It makes clothes dissolve when exposed to chlorine. But I have to be honest, I didn't know it dissolved dicks too! It's like there's nothing there...Hehehe~"

"Shhhhhh! Gina! Stop!", I said, whispering at the top of my voice

"Why? I bet you've been wanting to show my little sister that teenie weenie for the longest time. Go on then. She always did like a guy who made her laugh and I bet she's going to bust a gut laughing at your microweenie."

I tried to gather all the shreds of my swim trunks but they got all slimy and then disintegrated. I was panicking as I tried to hide my lower half. I couldn't let Tina see me like this. I hid against the pool wall. I saw her still soaking up the sun on the lounge chair. Gina was right next to me of course, pinching her fingers as she stuck her tongue out at me.