Sorry about Kame !
Did see your questions answered on other post. Not having a basking bulb is not good and the temp you stated is 60* on it. Only way to have warmed up was to get in the water 74*. Yes it could bask but never warm up to control its body temp.
Good read :
http://www.redearslider.com/basking.htmlBy a window I see but most of the good rays are blocked by the glass. What heat is uncontrollable not stable up , down , clouds .... Indoor setup's need both UVA (heat) and UVb for the turtles health.
You asked to be honest , that's hard for me with Kame ... , This is what I picked up on in you answer's. Yes she was 7" and had some age (30) we may never know , it may of been her time ? Turtles hide problems well , even to a Herp Vet. Sliders can live to be in the 50's and some even longer.
Very sorry about Kame !