The Forest Lord — Susan Krinard

After a night of heated passion six years ago, Eden Bradwell made the shattering discovery that the man she was about to marry was no mortal. He was a monster, a woodlands guardian spirit named Lord Hern who needed an heir to end the exile that had been imposed upon him. Devastated by his deception, Eden fled Hartsmere and wed another.

In a deep sleep for the last five years, Hern, the Forest Lord, has been informed that Eden--the woman he'd courted all those years ago and who had shunned his true form--has returned to Hartsmere, along with the boy he'd been told was dead. Vowing to steal back his son--and wreak vengeance upon the woman who betrayed him--Hern assumes the identity of a servant named Hartley Shaw. But with each moment he spends with the elegant woman and his beautiful son, his heart begins to cast off the bands of iron that has bound it--and he becomes devoted to finding something that will redeem the woman he has come to love...