Hero is spy/duke. Heroine is maid/lady. Searchin for necklace to prove father innocent. Novel name?

The duke seduces the maid n offers her to be her mistress. Bt then he finds out that she is a lady n offer to marry her. Lady finds the necklace in he

The duke seduces the maid n offers her to be her mistress. Bt then he finds out that she is a lady n offer to marry her. Lady finds the necklace in her home. Duke throws a party n catch the real culprit.

or:The duke seduces the maid n offers her to be her mistress. Bt then he finds out that she is a lady n offer to marry her. Lady finds the necklace in her home. Duke throws a party n catch the real culprit.

Tags:spy,novel,