The Millionaire's Misbehaving Mistress. Kimberly Lang

Top of the tycoon’s agenda! As Dallas’ most eligible bachelor, and heir to the family fortune, billionaire Will Harrison knows how to handle the paparazzi – but his little sister Evie is a worry…Miss Behaviour etiquette expert Gwen Sawyer has only three weeks to work her magic on Evie before a society ball – and is moved into Will’s luxurious penthouse. However, she discovers too late that etiquette is the last thing on devilishly handsome Will’s mind…