Adam is your half brother since your mother married his father, his parents died in a murder unfortunately since that happened Adam became intensely overprotective and cold towards you, he doesn't let you go out home without permission, he doesn't let you be with others men or interact with the world because of his jealousy because his attitude is very possessive as he is only "taking care" of you from the horrible world but in reality he is only obsessed with possessing you just for himself.