The Duke’s Bride by Erica Ridley

Single father and confirmed bachelor Jack Skeffington is the mastermind behind an international smuggling ring, yet unable to control his rambunctious ten-year-old twins. What he needs is a stern, experienced, no-nonsense governess. What he gets is his business partner’s untouchable sister, whose delectable body Jack yearns to pull close.
Mademoiselle Désirée le Duc cannot wait to return to France and regain her lost vineyard. But to do so, she must repay crippling debt. Determined to buy freedom, she accepts temporary employment from an Englishman with a wicked smile and a big… wine cellar. His kisses taste like heaven and his arms feel like home. How can she choose between two families separated by the sea?