What to do if I'm now being sued for a car accident that I had when I was 17?

Question Details: I am being sued for a car accident I was in when I was aged 17; I am now 19. I was in my foster parents' car and they said that hey had insurance. I am no longer in contact with them. As far as the summons says, they are being sued too. I have no idea what the insurance name was on anything.
