Jealousy Is a Turn-On

Lake

The air inside the rustic cooking cabin buzzed with playful energy. It was the mid-point of the couple's retreat, and tensions—both sexual and emotional—were simmering hotter than the cast iron skillets. Today’s challenge? A couples cooking class where every pair had to whip up a signature three-course dish for the judges, who were apparently the grinning, nosy hosts of the entire program.

Ivy tied her apron behind her back, fingers trembling slightly—not from ...