Francesca's Party by Patricia Scanlan

When everyone expects you to fall apart, do the unexpected: Get a life.

After years of being the perfect wife and mother, Francesca Kirwan realizes one dreary fall day that her life is a sad cliche when she catches her husband, Mark, with another woman. With her safe, predictable life turned upside down and an uncertain future ahead of her, Francesca has only two choices: sink or swim.

So Francesca decides to get a life...a life of her own making. But first she has to deal with the obstacles in her way -- her husband's ambitious young girlfriend who intends to get exactly what she wants; her teenage sons' mixed reactions to the changes in the family; Mark's own reluctance to accept the consequences of his actions; and sexy journalist Ralph Casson, who shows more than a professional interest in Francesca.

Then Francesca decides to throw a party, and that's when the fun really starts....