She rubbed her thighs together, trying in vain to ease the hot ache between her legs. This spying was making her too damned hot. She really ought to stop, yet she didn't want to miss a second of this exciting scene.

Shelly pumped Frank's iron-hard cock till he was shivering and moaning steadily. Then she flopped onto her back and pulled him on top of her. He sank down between her satiny thighs, and she cupped his ass and dug her long red nails into the taut flesh.

"Please, Frank, honey, fuck me," she whimpered.

"Oh, shit," he groaned, "I'm only human."

His ass jerked sharply, and Shelly's head lolled back in bliss. She gave a hoarse sustained moan as he shoved his long stiff cock into her burning needy cunt. Watching it happen, Vicky creamed right through her bikini.

"Oh, my God," she moaned softly.

She had to admit it – she ached to get just what Shelly was getting. She'd almost kill for it. She wanted to feel a huge hard prick cramming her starved little cunt, reaming her out. She'd never felt so frantically horny in her life.

"Unnnhhhh, honey, yesss," Shelly sobbed, "get into meeeee!"

Frank hit bottom, only his balls showing, and he groaned in delight. But Shelly didn't let him pause to savor the moment. She started jerking her hips, too horny to wait even a second for the hot action she craved. Frank snorted with lust and started fucking her hard.

"Unnnnhhhh, yesssss," Shelly moaned, "fuck it to me, baby, fuck me good and hard!"

On the other side of the fence Vicky was whimpering with lust and envy. Sure, she was furious with Frank for cheating on Joan, and she could have scratched Shelly's eyes out, but she was also going crazy with horniness.