I am that wife, not 27 years but 14 years. It is more than absolutely devastating; your past, your memories, the promises made, the dreams, you don't know what is true. I don't know their story, perhaps his wife knew from the outset and it became a marriage of convenience, or perhaps she found out down the line like me, but what I will say, from my experience, it is not brave to hide behind and play with someone else's emotions until you are ready to confront and are comfortable with your sexuality.