His sister-in-law sets up a sexual relationship with him. "Just this once..." she says, letting the woman's predatory desires find their way into the gaps in the man's heart. Like a dam bursting, his sense of ethics crumbles and he is unable to escape the swamp of infidelity. He forgets his wife... he forgets himself... and he is cuckolded... With each physical relationship that must never be discovered by his family, the two become immersed in forbidden pleasure. "I wish I hadn't known... my wife's sister was such a pervert..."
