Love Is Heaven — Barbara Cartland

It was obvious to Delysia that her lovely sister, Fleur, was deeply in love with young Lord Sheldon, and he with her. It was in fact obvious to all London, including Lord Sheldon's betrothed and Lord Sheldon's intimidating Uncle, the redoubtable Magnus Fane, who would stop at nothing to prevent a scandal... But it was Delysia herself who fell victim to Magnus Fane's legendary ruthlessness -- until Providence turned a case of mistaken identity into a lesson in true love!