As the family move into a mansion, David enjoys his millionaire lifestyle - but struggles to persuade Alison she can still trust him. The girls try to save their parents' failing marriage.

Alison wrecks her second honeymoon with David by dropping a bombshell about her love for Graham, and Sarah unexpectedly goes into labour.

Phil and Sarah plan to marry in secret. Meanwhile, Graham plans to seduce Alison and Virginia tells her family about her relationship with Tamsin.

Virginia makes Megan a rash promise, while Charlotte tries to persuade the family to apply to appear on a TV quiz show.

David confronts Alison about her affair with Graham, and delivers some shocking news that threatens to jeopardise the happy couple's relationship.

Charlotte begs Alison to chuck Graham out - an outcome that seems highly likely when his wife turns up out of the blue claiming complete ignorance of her husband's affair.

David helps rescue Graham from a mine shaft on the moors, but deep-seated resentments lead to a fight with tragic consequences.

Alison and David decide to wait until after the wedding before telling the police about Graham, and Sarah's hen night is full of surprises.