eva braun was not a party member, nor was she ever present when affairs of state were discussed.
on the other hand, the wives of himmler, goering, heydrich and von ribbentrop were commited national socialists; although all spent time interred, all survived into old age. gudrun burwitz (nee himmler) is still alive, and still nurtures the nazi flame.
so notwithstanding her closeness to hitler, eva is unlikely to have been executed after the war, and had she not been determined, had no real need for suicide.