His Lordship's Filly (a Regency Romance‪)‬

Bridget Durabian had no interest in the ton or anything else, really, except horses. Her indebted father, however, wagered her future on a race and Bridget was honor-bound to marry the Marquis of Haverly. Unfortunately Haverly, though delighted by Bridget, found her far too unconventional for his taste--and set about correcting her behavior. Which turned out to be something of a mistake...  Regency Romance by Nina Coombs Pykare writing as Nina Porter; originally published by Zebra Regency