Jesus came to help you open up and let the love in your heart out. People often think religion is about condemning sin, holding punishment over people, causing fear. They do not see our loving God, saw sin as our problem and our fear of being discovered in darkness and exposed to be ridiculed. He came to put his arms around us and say, "it is not your fault." The Lord says "Hurt has made you hard, it makes you lash out, but I will love and forgive you."
The story in John 8 of the woman caught in the act of adultery, is forgiven.
John 10:10 "The thief comes only to steal and kill and destroy; I have come that they may have life, and have it to the full."
It is through love we find life. Your mother must be very hurt and lost.
My family never understood the power of Jesus love, but over the years slowly they have begun to experience and open up to this love. It is by our example of loving and caring for them that they see Jesus at work.
I am deeply sorry that you have been abused, by people who should have loved and protected you.
The hardest thing is to let the Lord rebuild you into a glorious new person, but many can testify this can be done.
So let the Lord help you, and pray for your mother and reach out to other christian women who can help you with their experiences and victories. It is important to know we are not alone.