Forgotten Mate by Beth D. Carter

Greyden James. The mate who walked away after one night together. The man who almost destroyed her life. Zenia Zierdan works hard to keep a tight rein on her depression and anxiety. Working for the alpha helps her maintain a purpose within the pack. But everything changes the moment she scents vanilla and cedar and comes face to face with the man who walked away.
Greyden is confused why a strange woman smells exactly like his mate. When he discovers he’s been a victim of a black magic spell, he’d do anything to get his memories back.
Only through the power of true love can they find a happy ever after. Even as they both come to terms with the guilt they harbor.