My Twin Brother - Zenix x Werewolf! Reader

My twin brother Ein was the omega while I am the beta. I know how he appears but I love him, no matter what he does. He is truly evil and he grows more angry at me when I find a liking for a human boy. I was always curious why he didn't want me near him when he was in love with Alpha, she is a human. I just don't want to lose the two I love, even if it means me giving up something.