Maureen's mum Joan drops a bombshell - she's getting married and Roy, her new husband-to-be, is 20 years younger than her. The three couples gather at the very grand hotel for the wedding. As an impromptu stag do, Roy decides he wants them to sample the spa - much to Alan's dismay. Joyce and Carol are concerned and ask Maureen if she's checked Roy out. Is Maureen sure he's not after Joan's money?