Doctor by day Seductress by night

" My name is Mercedes Evan and I'm medical doctor at day....................... My name is Cassie Blake and I'm a seductress at night..........................." Meet Mercedes a 25year old uptight,boring glasses medical doctor. Living life a day at a time, but she has a secret, A secret no one knows or so she thought. Sean Williams a 28 year old billionaire, comes across the seductress Cassie and is determined to win her heart and make her His, but when he sees Mercedes at a formal function he believes that Mercedes and Cassie are the same people. Now how can He prove that she is a doctor by day and a seductress at night.