Siobhan Redmond shares candid bedroom scenes with actor Paul Bettany, who plays her tortured and much younger lover Rob. "We had to film our most difficult sex scene just two days into shooting," recalls Siobhan. "It was very much a question of, 'Hello, how do you do? I'll take all my clothes off now and jump about on top of you'. "Luckily, Paul is a delightful boy and he was very easy to work with. We arrived at a method of mutual consolation, giggling our way through those scenes. Very late in the proceedings it suddenly occurred to us that it would be a lot easier if we had a glass of champagne, so we did." "It's quite a long scene, with only one cutaway. All the rest is done in one shot, which I really liked. We rehearsed it quite a lot because we wanted the scene to be truthful."