Simply Sinful (Harlequin Comics‪)‬

Kayla Luck has taken over her family's etiquette, charm, manners and dating school, but it seems that her luck has run out. The death of her aunt and uncle is one thing, but finding out that the school might have been a front for a prostitution ring is another! Kane McDermott is a detective on the case, and he's gone under cover to find out the truth. He's scoping out Kayla to see if she's hiding something unbecoming, but he may find that she'll make him become something better.