Ben is still desperately trying to forget that Katy had a one-night stand just before she announced she was pregnant. Nine months later a new baby explodes into their lives, creating utter chaos. Being a stay-at-home dad isn't as simple as it seems, in fact it's a disaster. Then help arrives, in the most unlikely form: the wife of Katy's ex-lover. Should Ben tell Katy about his secret rescuer or is it his turn to keep a secret…?