Romance Novel with knight in the name?

In the early 2000s I was subscribed to a subscription service that sent romance novels for the month. What I remember about the one in searching for is it has "knight" in the name. It was about a nun named Lucy who had either a bad hip or weak legs? She ws travelling with a knight I think maybe was named Alec. And the end of the book is.. almost dreamy..you can't tell if it's a happy ending or if they died.. it's like a dream sequence type of ending.

The Virtuous Knight by Margo Maguire?