'To say that Babs is my closest friend is rather like saying that Einstein was good at sums. And if you've ever had a best friend, you'll know what I mean. Babs and I had such a beautiful relationship, no man could better it. And then she met Simon.'

Now Babs, noisy, funny Babs, is getting married. And Natalie, 27, is panicking. What happens when your best friend pledges everlasting love to someone else? As the confetti flutters, Nat feels her good-girl veneer crack. She teeters into an alluringly unsuitable affair that spins her crazily out of control and into trouble - with her boss, Matt, and with Babs.

Caught up in the thrill of bad behaviour, Nat blithely ignores the truth - about her new boyfriend, her best friend's marriage, her mother's cooking and the wisdom of inviting Bab's brother Andy - slippers and all - to be her lodger. But perhaps what Nat really needs to face is the mirror - and herself...