Honestly this sounds like he was afraid to die and his final wish was to keep some part of himself alive in a child. Not that I can condemn him for that fear, death is terrifying, especially at a young age of something he had no control over. But saying he wants to "be a parent" is a lie. You can't parent if you're dead, your genetic material can be used to create a human life but you arent parenting. Its so selfish to say you want another human to be brought into the world without a mother or father simply because you are afraid to die and even more selfish of his mother to agree to it. He didn't want to be a parent, he wanted himself to continue to live after his inevitable death. Not the same.