From This Moment On by Lynn Kurland

In this sweeping, emotional love story, Lynn Kurland takes us back to the thirteenth century–and all the passion and magnificence of medieval England…

Colin of Berkhamshire knows two things–the pleasures of warring and that brides do not want him. Two years ago his bride-to-be, Alienore, fled and hasn’t been seen since. Yet his father keeps foisting prospects on him. The latest seems to do nothing but faint.
Alienore of Solonge knows two things as well–that fleeing not only Colin but also her scheming stepmother was the right thing to do. Yet as a knight in disguise she constantly fears discovery. At this point, she’s not sure whom she fears more, the Butcher of Berkhamshire or her evil stepmother.
Through a bizarre twist of fate, she ends up journeying with her charge–Colin’s latest intended–to England, where Alienore finds herself not only in the Butcher of Berkhamshire’s garrison, but being made over into a knight by him personally. She thinks her life cannot worsen.

Until she begins to fall in love with him…