My interpretation is, it's all a symbolic representation of the fact that evil can't claim you unless you willingly invite it into your heart home.
So the invitation to a vampire has to be given by a person living in the house, and expires when that person no longer lives there, or is dead. B is safe as soon as A moves out, in other words. There may be a grey area if A leaves some of their stuff in the house, because have they really moved out then? Or if B is A's parent, and tells them "This will always be your home too"?
Interestingly, note that in the 'Dracula' novel, the vampire also has to invite people into his own house. ("Enter freely and of your own will") - again, reinforcing the idea that people have on some subconscious level to choose to become victims of a vampire.
no subject
hearthome.So the invitation to a vampire has to be given by a person living in the house, and expires when that person no longer lives there, or is dead. B is safe as soon as A moves out, in other words. There may be a grey area if A leaves some of their stuff in the house, because have they really moved out then? Or if B is A's parent, and tells them "This will always be your home too"?
Interestingly, note that in the 'Dracula' novel, the vampire also has to invite people into his own house. ("Enter freely and of your own will") - again, reinforcing the idea that people have on some subconscious level to choose to become victims of a vampire.