Riona by Linda Windsor

Riona, a gentlewoman of faith, discovers that her plan to help the disadvantaged includes not only the plague orphans in her charge, but the arrogant, handsome adventurer who feels honor-bound to save her and her lands by marrying her -- with or without her consent. Lord Kieran of Gleannmara depends on nothing and no one save his wit and skill with steel, but soon a deadly twist of fate forces him to acknowledge his need not only for the lady Riona and her worrisome entourage, but for her Lord as well.