Accidental Mistress (Susan NAPIER)

Emily has sneaked into a shady party for a reason that she can’t tell anyone. When she gets tangled up with an insolent guest, she is rescued by a gorgeous man named Ethan. She’s never met him before, but she becomes completely entranced by his gaze. But Ethan thinks Emily is a money-grubbing woman who is only there to seduce his wealthy, elderly uncle! Source: Harlequin