Forgiveness and love goes a long ways. It won't be easy, but nobody said it would be. I dont't believe GOD brought you this far to leave you now.
Be a great listener and ask a lot of questions that way you won't have to say much. Do what you can live with. The bible didn't say honor your father and mother only in good times. It says Honor your father and mother which is the first commandment with a promise. Ephesians 6:2
I don't know what you suffered, but if they seek forgiveness then lovingly forgive. If they don't seek forgiveness lovingly forgive for yourself anyway. None of the things that happened in the past will ever change, but you the hurt passes and if there is any love still there. It will show.
If they need money and you have it just give it. GOD will provide far more than you could ever give out of a good loving heart.
I do know how you may feel; first hand knowlege.
I learned that even bad parents LOVE their children.