linda thompson , now 64 , was married to bruce jenner from 1981 to '86 .
she has published blog detailing how he told her of his gender struggles .
explains how revelations led to their divorce following births of two sons .
also speaks of bruce 's painful electrolysis and surgeries to feminize face .
young sons noticed father 's breasts once ; she lied to cover the changes .
the pair , brandon and brody , now adults , supported bruce in abc tell-all .
this is despite bruce having ` cut his sons out of his life for years ' after he stopped taking female hormones and married his third wife , kris jenner .