
No it's not too late to do something about it. I assume that your mother had insurance on the car, or that your sister had her own auto insurance, or both. All you have to do is turn the claim over to the insurance companies for her mother and/or sister. They will defend your family, hire a lawyer at no cost to you, and pay any award (if there is one). You can tell them your side of the story and they will present it for you.
Good Luck,
Andy Gillin, Senior Partner