An eye for an eye...a husband for a husband

Elena is slowly approaching fifty. She's quite happily married, her children are grown. She knows that her husband has occasionally slipped into a bed other than their marital bed in the twenty-five years they've lived together, but somehow she's come to terms with it. But when her husband suddenly announces that he has fallen in love and intends to marry his beloved - ergo he needs to divorce her - her world comes crashing down. But only for a while. Then he decides to take revenge...