The Virtuous Knight (Medieval Brides #4)
Margo Maguire

One emotion compelled him: grief! Widowed knight Alexander Breton had gone crusading to retreat from sorrow. Indeed, he was to take monastic vows after fulfilling a sacred quest for a dying friend. But fate decreed he would instead find Lucy Kendal, the brave, beauteous innocent, who needed protection...and needed him!
Harlequin Historical #681, November, 2003.