No, stay with your friend.

You can find a million more of those girls, why ditch your friend? As you reach the highest end, Ana laughs.

"I'm a little afraid John!"

You smirk. "C'mon now, you're a college girl."

She looked a little worried. "What if the wave swallows me up?"

"I'll be in the same tube with you. Besides, the wave will make a noise before it starts, so you'll be prepared."

As if on queue, the loud whistle for the wave started. Ana squeaks and grabs you.

You duck underwater and pop up under the tube, behind Ana. There's barely room between you due to the size of the inner tube and your stomach is touching her ass, causing you to get a bit hard.

The wave starts to shift your tube up and down. Ana laughs and screams. All you can focus on is her ass.

Your dick reaches her ass, and is lodged between her tight cheeks. You're raging hard at this point, and all the moving isn't helping either. 'Fuck it.'

You grab her waist and pull her towards you, pressing your dick against her cheeks again, moaning in pleasure. She moans a bit too, and your dick starts to slip out. The waves are pretty aggressive now, so you press your bare dick in between her butt cheeks again and she flexes her ass, making you moan again. You pull even closer to her and slip it under her swimsuit, sliding in and out of her cheeks. This feels so good you can't even think past what's going on.