Anna is a nurse with an active imagination. She has a good relationship with boyfriend Sean, but that doesn't stop her fantasizing about more exciting sex.

Jack and Amanda have been together for years and are still in love - they even still have great sex but it all begins to fall apart when Amanda catches Jack while masturbating fantasizing her best female friend, Claire.

Ellie has got it all - great looks, bucket loads of confidence, her own business and a gorgeous solicitor boyfriend, Nick. But she wants a sense of permanency.