I Thank God Almighty that my wife isn't even remotely like this. If a female friend of mine (yes, I have them--cute ones, too) or a friend of my wife were to come to us and seek our protection, my old friends Samuel Colt and Gaston Glock would be asked to help me. And, my friends Smith & Wesson would help out. NY has a little codicil in Section 36 of the Penal Code (sefl-defense) which allows one to use deadly force on another, even if the first person is not being attacked, to stop a felony (such as rape, robbery, or murder).
Said provision would be invoked if the situation listed in the first two lines were in effect. And, if someone was after my daughter, well, . . . let's just say that it wouldn't be pretty. I'd be hard-put to not decapitate the individual.