For very many years this subject was hurtful.
When my parents got divorced I was only 15 and, to me, it seemed to have been out of the blue. My father cheated on my mother and she found out. Turns out they had been done with each other for years, but none wanted to leave. Once it all surfaced, my mom was enraged, my brother, who knew it all, relieved and I, I was heartbroken.