Carl makes another hint to Chas in front of Paddy that she needs to tell him the truth and she starts to think he has a point - she can’t continue living in fear that he's going to find out. Katie warns her that her whole life is at risk and to think long and hard before she makes any rash decisions about leaving Paddy, but Chas can’t see any other options, she feels wretched for betraying his trust and can’t live with herself. (thetvdb.com)