Mark's best friend.

"I think James would be a great fuck!" Kara said excitedly.

"But he's married! What do you tell Rosey?" Mark replied.

A gleam appeared in her eyes. "Nothing. Or everything, and invite her!"  

Mark was stunned. Jen was really getting into this! James was a tall islander guy who probably had a 50 foot schlong, and Rosey was a very pert young woman... the traditional odd couple. But would their couple be a quartet?