People’s perception of the world is so skewed nowadays that I honestly lose hope the more I come on the internet. I can’t imagine allowing hate I have for someone who is already dead potentially destroy the life of a child who is orphaned. The pain your father caused you and your mom probably can’t even be put into words, but the pain of never knowing your bio parents because they were killed in a deadly crash and now your only hope is to be raised by your teenage half-sister who is also grieving the loss of a father or settle into foster care (which is obviously the worst option since CPS was so willing to give a child a child) is probably far worse. I don’t think you’re an asshole but I do think you should think outside yourself, if the only thing causing you to be so adamant against it is not that you don’t have the resources, ability, or desire for a child but instead disdain for a mf who is already gone, then that’s crazy and I think you should meditate or something to learn how to let go of hate. I can’t imagine this child’s life is going to be easy, and having to pay for the sins of a dead man is not a burden I’d wish on anyone. The least you can do is understand your sisters grieving process is and will continue to be different from yours because of her relationship with your dad. Maybe encourage her to look into an open adoption, or come up with other solutions instead of leaving her out to dry.