After more than a decade together, the couple's bed had shifted from the passionate heat of their newlywed days to a routine pursuit of mere pleasure. One day, the husband came home early from work and noticed his wife acting differently. She seemed to be hiding something, and when he pressed her, she reluctantly moved her hands away to reveal restraints. "Lately, our sex has gotten stale, hasn't it? So let's try this..." With his wife's suggestion, the couple's first SM play began.