Shapeshifter: The Demon's Wife (Sebastian X...
This is the second book in my Shapeshifter series. So you should probably read the first one.
Anyway, now that you two are engaged, all that's left is to get married. However, when trouble with Alois Trancy arises, your marriage has to wait.
The characters do not belong to me, the storyline is mine, and you belong to you, my friend.
The first book is: Shapeshifter (Sebastian X Reader)