Yeah the older one, the mom, has survived getting hit by a car (lost half her tail) and more recently (last sept/oct) a stroke. She is still in decent health for her age. Her son is doing well too, little arthritis on the back end, but otherwise in good health too.
Their ages are rare though. My family lost one cat when he was 9-10, and my buddy Oliver whom I lost on June 6th was 13. So it's weird having 2 cats that are outliving cats half their age.