All the money and comforts in the world become meaningless when you loose your wife. I say until recently, as these changes and affection were unwanted - the more I did, the further she pushed away into withdrawl. I don't know if she'll ever want me again, but the point I'm trying to make is that people CAN change. Willing, unconditional, and sincere change can happen. And Yes, only time will tell if he's sincere.
Human nature is always willing to pretend to avoid something unpleasant.
The truth is that I'm happier in this mode than I was when I was so focused on work and my volunteer activites outside the home. I can't tell you if your husband is sincere, or not, but give him the benefit of the doubt. Make him prove it, but don't reject him if your wishes come true. I know I am for my wife. Prayer doesn't change things for you - it changes you for things.