Seducing My Sister's Husband Behind Her Back

William and Fiona's marriage is falling apart. Seeing an opening, Fiona's younger brother Leon pushes William to get even by cheating, and offers himself as a practice partner. William still thinks of Leon as the kid he helped raise, with no idea Leon has been waiting years for this chance. What starts as a reckless game soon turns into something neither planned. William battles his conscience and tries to pull away, but Leon refuses to let him go, chasing after him to reveal a love he has carried for a decade. Their secret affair risks exposure at every turn.