You got to love the fact that they can't have sex unless they are married, so by golly I will just start hitting on woman at my wife's funeral. How sick is that!!!!! Like was mentioned those two deserve each other. I am sorry you daughter was hurt, both your kids sound like good ones.
I also had the samething happen to me. I decided I no longer wanted to be a crazy JW mostly because I didn't want my 3 girls married off when they turned 18. I also wanted them to go to college and experience life. But my JW elder ex-husband thought that I was taken over by Satan and left me and my kids. He remarried a JW woman that he had known when he was a teenager. My kids tell me he isn't happy, but at least he can have sex. Again just like your wife, my husband deserves what he has.
Just be glad you are free from it all, I know I am.
Leslie