For 15 summers, Rosalind Scott and her husband went cruising, usually in the company of her mother-in-law Lilian. Invariably Lilian managed to put her own inimitable stamp on the holiday by means of everything from staged accidents, exaggerated bouts of sickness and luggage mix-ups to queue-jumping and run-ins with customs officials. Now Rosalind (or 'Roslin' as Lilian always insisted on calling her) has woven together her memories of those cruises,...