I think it was very courage, and yes, I think you did do the right thing.
Yes, your wife will be mad, it's more about the whole intrusion of her personal space, blah blah blah... but in an ironic twist... she'll also feel some sort of relief, that you're willing to fight for what it takes. Trust me. She won't show it, she won't let you know, and she'll keep that tucked away inside of her. But I am willing to bet you, you sparked an interest there.
She may may also push a little harder from you, but she will still be hanging on, all because you dared to stand up for what you believe in. That letter was the easy part, the hard part is walking the talk.
