Alpha,Please Mark Me - Episode 4

"I'm going to snatch back my mate and kick out his shameless ex-wife!" Isabella Cross substitutes for her sister to marry the strongest werewolf, From the moment they meet, conflicts arises between them. Hunter not only has a bad attitude but also keeps a mistress named Alice in the mansion, which angers Isabella. The successive acts of protection from Hunter and the revelation of his past softens Isabella's stance towards him. However, Isabella notices a peculiar, cloaked woman that strike her as strange. She finds Hunter's presumed-dead ex-wife mysteriously back from the grave!