Lessons in Love (Love #7)
Marion Chesney

But, when Chamfrey thought better of it and returned the girl, Esmond nonetheless exacted his own price: Chamfrey could redeem himself and save his skin by marrying his little victim nine years hence, just time enough for Chamfrey to inherit a title and fortune.
Lucinda’s father could not have foreseen what a beauty Lucinda would become, nor that Chamfrey, a newly made Marquess, would actually welcome the fulfillment of what was supposed to be his punishment!