At one point, Mark dunked Rachel and she came up sputtering for a moment before diving underwater. He yelled and kicked for a minute, but she emerged with his boxers and tossed them to the side of the pool.

"Ow," he said, "No grabbing the junk."

"Don't dunk me," she warned, grinning.

Mark dunked her again, and her sister came to her rescue, surging from the water and landing both hands on his head to try and pull him down. Rachel came up and began to assist her, but it was no use. Mark shrugged them off easily, and managed to yank Becky's panties off in the process.

Kimber came...