Help me repay my grandparents

I have lived in the last ten years enough pain for three lifetimes. Starting with the mental illness of my first husband which ended after 14 years of marriage with him killing himself. He left behind myself and our five sons. Later I tried to salvage my life and it was a complete disaster. He left me with the one son we had. Then I met a wonderful man ready to love me and my six sons unconditionally. And he got cancer, then his mother died, he was a recovered addict but the physical and emotional pain on top of the stresses of a new blended family and being treated with opiates after removing one of his lungs, sparked his relapse. Since then, he has proven that the children and I, and our own new daughter are the most important part of his life. I chose to stay with him which has brought me much grief in my own family. I have had to pay thousands in legal fees to fix the mess he caused. I would do it all again because one thing I know after the loss of my first husband, is the children are not better off without their biological parent. Unless he or she are crazy murders, their loss leaves a space and a pain that can never be filled. Marriage is worth fighting for and so is a child's right to have a healthy parent. My husband is in recovery again. Almost 11 months clean. I have never committed a crime in my life, or abused anyone, or participated in recreational drugs, yet i am paying the price for not giving up and the results are nothing short of miraculous!
My granny and grandpa helped me pay a very expensive legal fee and they need their money back now. I always take care of my own family, but it  very hard. I need this blessing. Please share and help me with this burden. My husband is now diagnosed with a brain tumor and will not take off work till we pay this off to have it removed. I just can't handle one more loss!!!  God bless you.