Lulu has always been intolerable. From spending every childhood moment worming her way into the affections of her stepmother (spitefully undermining poor Geraldine, her dumpy and hardworking stepsister, along the way) to growing into a sexy, long-legged and ruthless adult. Jobs, lovers, fashionable clothes: Lulu picks them up at whim and drops them with equal ease, confident that Geraldine and her faithfully supportive husband, Robert, will bail her out of every passing problem.

But not even watchful Robert has realized quite how much Geraldine's exemplary patience has rested on one simple but long-lasting assumption about her own family.

Could everything finally be about to change ...?