Keep Watching...

Andy feels like he's frozen in place. He knows he should be helping Kate, but he just can't bring himself to move, and continues to watch in jealous fascination.

As James continues to grope Kate, she soon begins to respond, first uncrossing her arms, then starting to return his kisses, until finally she has her arms wrapped around his neck and is passionately kissing him back, pressing up against him.

Encouraged, James sits back onto the submerged bench, the pulls Kate onto him, until she's straddling him facing towards him. Andy sees some shifting and fumbling underwater, until Kate finally lowers herself onto James with a moan, closing her eyes and throwing her head back. With a thrill, Andy realizes that James had pulled his trousers down slightly and pulled Kate's swim bottoms to the side, and had slid his cock inside her, and they were now fucking!

Kate started to slowly grind and gyrate her hips against James, running her hands through his hair and down his back. Andy can't believe how bold she'd gotten since they dated: she'd refused to even give him a handjob in a dark movie theater, and yet here she was fucking James in public! Sure, it was a secluded spot, but still anyone else could swim over.

Meanwhile, James had reached up and pulled Kate's top down, exposing her perky nipples, which instantly began to stiffen in the cool water. Leaning forwards, he took one into his mouth and started licking and sucking it, pinching and pulling on the other one with his hand. Kate let out a muffled moan of pleasure, and put her arms around James's head, pulling him into her breasts. She started grinding faster against him, breathing heavily.

Andy was surprised and a bit confused to find himself getting hard at the sight. Feelings of arousal and jealousy conflicted inside of him, and yet he still couldn't bring himself to stop or interrupt them. As he watched, Kate gave a huge shudder as James thrust himself upwards, fully impaling her on his cock, and bit down on his shoulder as she came. James wasn't far behind, grunting as he shot his load of cum into Kate.

Spent, they re-adjusted their swimwear. "Well, guess NOW we can head back to the group" James said happily. Andy quickly ducked back around the corner, and headed back for his other friends, feeling conflicted.