And who tell you the baby is going to be a bastardHave you not read from the holy book(s) that God hates all sorts of killing(murder) including abortions
If you sincerely want God to be a judge in this case, never do what will displease Him so that you don't loose His favour. Allow your sister have the baby and put God to the test, wait and see His hands in your life, and I bet you, your sister will never be in want to take care of the baby. Who knows, the baby might your deliverer and the joy of your entire house. (Malachi 3:10; Psalms72:12,13). A word...
Good day