She probably found out about your pron addiction, OP.

I pretty much lost interest in all men when I realized how bad the pron addiction is for the majority of them. I had no idea how bad it was until recently from doing some research. Perhaps your wife has just resolved herself to the fact that she will never measure up to any of those women that most men lust over these days. At a certain age you just accept the fact that men are visual, we wives age and get saggy and most men are going to stray and you find your joy not from people and relationships, but from more cerebral things.