I know where you're coming from Dearth
However, I believe Jaime and Cersei will die together, or at least each within a very short time span from the other. (OK I actually believe Jaime is the valonqar and will kill her, then either kill himself or be slain by a guard or someone similar.) So, even though things ain't looking good for Cersei right now, she can't die till her children are all dead, so I reckon she and Jaime are safe for a book or two yet.
If Jaime dies in ADwD, I will be utterly devastated and will throw my book out the window Bran-Stark-style.