It's Christmas Eve, but the Simpson household isn't filled with joy. Betty can't stop thinking about meeting the son she gave up for adoption when she was just 15.

Still coping with the revelations of her mum's past, problems arise in Kelly's marriage—resulting in her sleeping with her husband Kevin's gay brother. When all is revealed, things worsen, especially as Kelly learns she's pregnant! But who is the father?

Carol faces problems when she realises she has fallen for fitness instructor Max, which raises new troubles with her teenage son.

Lauren has the chance to make all her acting dreams come true — but at the price of losing everything and everybody that matters. Can she get back her friends when she needs them most?

Rebecca decides it is time to leave home. Her boyfriend Sean is keen to help with the move, but her break for independence is short-lived when tragedy strikes and Norma needs support.

Jamie's love life picks up when his feelings for a beautiful woman are returned. However, obstacles fall into place, including her daughter and she's got an ex-con ex-boyfriend. The gang head back to Trisha for their final weigh-in. While Jamie provides the catering, Kelly gives birth to a baby boy.