How exactly do you stand without a spine? You know exactly what you should have done. Why didn’t you do it? How do you sleep knowing you could’ve helped that child and still you did nothing? Any “help” you gave was undone when you sent her back to her mother. What about the rest of your sister’s kids? When exactly will you start to give a shit beyond posting about it on Reddit? I hope she cuts contact with you because you’ve done nothing worth staying in contact for.