Redemption of a Marquess — Tarah Scott

Valan Grey, the 6th Earl of Edmonds, the Marquess of Northington, has no wish to sire an heir. His three-year-old nephew will carry on the title. His fertile sister has already borne her husband another son and a daughter for good luck. The title is safe. So why marry?

Miss Jeanine Matheson has graduated from Lady Peddington's School for Young Ladies. Only, Jeanine isn't interested in finding a husband -- at least, not a young healthy husband. She aspires to become a businesswoman like Lady Peddington. All she needs is a very rich, very elderly gentleman to marry her and then, well…pass on to his reward.

Other Rules of Refinement Romances
One Good Gentleman
Shameless
A Marriage of Necessity

The original Marriage Maker romances
Worth of a Lady
The Marriage Wager
A Lady By Chance
How to Catch an Heiress