Christmas in Camelot — Brenda K. Jernigan

The Greatest Gifts...
Lady Noelle has no intention of marrying just to save her family's castle. She feels nothing for Sir Gavin, the man who will become her husband on Christmas Day. Then she spies Camelot's newest knight, the notorious Sir Nicholas the Dragon, a champion as renowned for his prowess in the beds of Camelot's maidens as for his skill in battle. Noelle's heart has found the man she longs for, even as her hand is promised to another.

...Are Always Unexpected
Sir Nicholas's only loyalty is to his king whose orders are clear: He is to fend off the enemy besieging Noelle's castle and bring the lady safely back to Camelot for her wedding day. But spending time with the proud beauty awakens an irresistible hunger in him. Now, as desire does battle with duty, Nicholas has only two choices -- to surrender the woman he loves to another man or fight to the end to make her his own...