Blood Moon Lovers

Carl, a hybrid werewolf, takes his human wife Eve to an ancient castle for their honeymoon, where he unexpectedly comes face to face with his vampire brother Miles. A mishap leaves the two brothers with each other's souls. Their mother Vivian stirs up trouble, insisting that the only way to undo the swap is for Eve to bear a child whose blood carries all three of them. When the family's hidden secret comes to light, Vivian turns murderous toward Eve.