The idea that your partner in life replaces your parent, either of them, is so weird. Women are adults capable of taking care of ourselves, even though our parents took care of us as children. She is no longer a child and this weird vibe coming from the dad is concerning and reads, at least to me as creepy. He needs to get over himself and move on because she’s not “his” to “give” to the fiancé. She is an adult who can make her own choices.