It is human nature to be curious about who we are and where we came from. Erica seems like a strong, caring, compassionate and intelligent young woman. It is commendable for her to come forward to face this in her life. Maybe some people don't need to face their pasts, but she did need to. Life is not fair alot of times and is very hard alot of times, but she has made it in this life despite the terrible thing that happened to her Mother. The wisdom she has at such a young age is impressive. She has forgiven as well as thought of what her Mother would have wanted. We don't really know what the Mother would have wanted, but we do know that she was married to her Father which meant there must have been love there as well as having two children together. People tolerate alot of things as a result of love. Maybe the Mother should have left the husband if drugs were causing such a distressful lifestyle for her and her kids, but she didn't and loved him enough to stay and make the best of her family. What the Dad did is in no way right, acceptable or excusable, but it is explainable when you know the impact that drugs have on a human body and brain. The one thing that the Dad did not do was harm the kids. So many times, the parent will kill the children as well as or instead of killing the spouse. He had to have loved his children. He was and is a very sick man who needs constant help and support in order to maintain a productive and "normal" life.
We are not God! We cannot judge him and should not condemn him for making an effort to give his daughter the opportunity to fill in a gap in her life that has been missing and that only he can do. I don't know what this man is capable of as far as if he is still a threat or not to anyone anymore, but he is surely being watched and monitored during any interaction with his daughter, so if it makes her feel good to have this man back in her life and try to do what he can to help her heal as well as himself then that is what they should do. Anger and hatred are never the answer to anything. Look at our world today what we are facing because of those two things. Feeling hurt over what happened here is so normal and expected. It is just not comprehendable for someone to be able to absorb what this man did, but anger and hate are only carrying on the negative things that are a part of this story to begin with.
Follow your heart Erica. If the Lord brings you to it, he will see you through it! Have faith and you will be led in the right direction. I guess I could keep typing on your behalf all day, but just know that my thoughts and prayers will be with you, your sister, your Aunt , and yes, your Dad, and anyone else hurt or affected by this fragile situation. It is easy for us to love those that love us back. It is the love that we give to those that hate us or maybe don't deserve it that we will be rewarded for one day. Stay strong!