Otherwise Engaged by Antoine Balzac

At one and twenty, Lady Angelica Fitzhugh, the youngest sibling of the Earl of Hillcrest, has been rusticating in rural Hampshire for two years. After her first Season, her betrothed managed only second place in a duel to the death just two days before their wedding. Out of the blue, her papa has informed her that to save the Hillcrest dynasty, in five days she is to wed the rather ancient Earl of Scarborough, become the step-mama to his twin daughters, and sail to Australia on her husband