Chasing a Highland Moon (The Highland Moon #3)
Gwyn Brodie

When Cin is injured, Claire (whom he knows as Jenny) tends him, and he becomes quite smitten with the raven-haired lass, but when he learns she is his servant, he is dismayed, as his father adhered to a strict policy of no dallying with the servants, a policy Cin soon regrets, for he cannot deny the hunger she awakens in him.