Can I be sued for an auto accident that caused the death of both drivers

I purchased a car for my granddaughter and she is on my insurance policy She was driving in the westbound lanes on an eastbound road causing a head on collision killing both drivers My insurance is stating that they are responsible for $$$ only to $$$ Now I’m being told I am going to be sued by the other driver’s family I own my home and I am on social security and it’s my only income Am I going to lose my house and income What can I do What am I responsible for