Charley Headley is Max's sister in law. She got the job of PA when Max took over Waterloo Road. Charley is in a relationship with Chris Mead. Max has always had a thing for Charley. He believes he's married to the wrong sister. He goes out of his way to form a relationship with Charley. Soon enough, an affair is beginning. Charley can't keep Max off her mind. She wants him all the time. Can Charley and Max keep their affair hidden or will it be exploded for the hurt that it causes. Will Charley lose everyone because of her love for Max?