A reversal of fortune.

You can't kick with your legs, so the only way to get yourself back up is to claw at the water with your hands. But what are you thinking? That's such an ineffectual way to move, you need to fight back! But how can you? When she slammed into you she knocked most of the breath out of you. You had to crush the air out of her to outlast her last time - you've got to get back to the surface and regroup!

Your panic is so great that you don't notice the tug on the waist band of your trunks. You only notice when her strong, slender fingers curl around your dick and balls and yank them out of your swim-shorts and into the open water of the pool.

You stop thrashing for a moment and look down at her. Her legs are wrapped around your knees, pinning your legs together and both of her hands are free, one of them stretching the waist band of your trunks and the other cupping your large, heavy balls. With an mocking insolence she blows you a kiss and releases the elastic of your trunks, letting the waistband snap back, now under your genitals. You flinch, but the pressure just behind your balls immediately makes your package even more sensitive, and you're sad, but not surprised to see that you're already half hard. She's not even stroking your thickening shaft, she's just cupping your balls, squeezing them gently, but nevertheless it's enough to get your sex-fixated brain going and a dirty smirk appears on her cute face as she watches your prick get harder and harder without even a stroke from her.

You're frozen in the water, the pressure building in your chest as the hand she was pulling on your elastic with, disappears behind her back. She actually has the composure to bite her lip under the water, and catch your eye cheekily as she pulls on the string fastening her bikini. The strings float apart dreamily in the water, the blue cups float upwards, and suddenly you're looking at her firm breasts and her small dark nipples.

And then you realize your dick is rock solid.

She grins in triumph and pushes herself away from you, letting you both rise to the surface for air once more.