Forbidden Alliance by Diana Cosby

Bound by revenge, a woman turned outlaw and a knight sworn to reclaim his birthright band together to vanquish an enemy of Scotland …

After her family is slain and her home seized, Elspet McReynolds flees into the forests surrounding Tiran Castle, where she resorts to thievery to survive and save her sole remaining kin. There she finds an unexpected protector and ally in Sir Cailin MacHugh, rightful heir to the earldom of Dalkirk–a noble rumored to have perished at sea . . .

Sir Cailin owes his life to the Brotherhood for saving him from a murderous plot. But what is the Knight Templar to do about the fearless, sword-wielding beauty who has enlisted his aid–and awakened his desire? In the face of devastating betrayals and traitorous enemies closing in, can Cailin and Elspet dare claim a love that makes no promises–for a future they may not live to see?