How did you and Olivier Martinez prepare for your numerous sex scenes?

We had a lot of discussions. But, as I told Olivier after our first love scene, obviously my bark was a lot more than my bite, because you can have a lot of courageous talk but between "Action" and "Cut", a lot of other things go on. Behind Olivier's back, I would say, "We held hands in the trenches of the war and we have this wonderful experience behind us that nobody can take away from us." Fortunately it's on film, so people can believe how brave we really were.

What do you consider the greatest 'crime' in the film?

For all of us, I think, when we read the script, the betrayal of trust was the greater crime. That's what everyone identified with, that question of: When are you ever safe? But when you go through something like they do, it can bring you together. Even as an audience watching, you realise that it's about being honest with yourself first, so that you can do the homework and bring that to your relationship, and hopefully find excitement within it. That way you'll avoid such a disaster as this one.

Do you think your characters could ever be happy again or will there always be a degree of mistrust? (SLIGHT SPOILER)

Obviously the trust they had is gone, but now they've got something else to build on. They're completely stripped of all their pretences and their previous hopes and specific things. I never saw the original French film [Claude Chabrol's "La Femme Infidèle"], for various reasons, but there is something perversely romantic about what he [Gere's character] does. You could see it as a fight for love in some really primitive, animalistic way. So, yes, we see them wanting the same things. And if two people want the same things and are willing to adhere to that, anything's possible. That's just my opinion.