Still waiting for George's passport to arrive so they can go on honeymoon, Claudie is making her presence felt in the household. Both Anna and Sarah are struggling to keep their feelings towards their step-mother under control. When Claudie starts throwing their mum's belongings out, they are furious. And when George approaches Anna to suggest that she might invite Claudie to be Imogen's godmother, Anna refuses point blank.

Sarah has arranged for an ultrasound demonstration and the team gather to see what this new technology can offer. They're all impressed and Sarah offers to pay for one there and then. George's unhappy about the rapid changes taking place in his practice until his daughter's remind him that, technically, he has retired. While everyone has been involved trying out the new equipment, Claudie has been babysitting with disastrous consequences, putting her on a collision course with Anna who is apoplectic with rage.

The morning of Imogen's christening dawns with the usual family chaos. When Imogen is sick down her gown, George remembers that Anna's old gown is in a box amongst the things Claudie was clearing out. Dashing upstairs, Anna uncovers more than she bargained for when she opens the box and her birth certificate floats to the floor. She's stunned to discover George is not her father. When confronted, he declares he's always loved Anna like she's his own daughter. Anna demands to know who her real father is but he says that Imogen wouldn't reveal his identity. After a few drinks, Anna and George are reconciled.

Fiona confesses to Anna that James isn't Theo's dad, and that she had an affair with a married man who Anna knows. Anna doesn't suspect that man is Tom.

Elsewhere, sparks fly between ex-lovers Sarah and Adrian and she agrees to go to dinner with him.

Meanwhile, Tom's shocked to learn that Anna knows about Fiona's fling with a married man.