I really feel for you. As a woman who's gone through gastric sleeve surgery I understand both sides of the argument. I'm 6yrs post-op. I would have done almost anything just to be thin. I've been admitted into the hospital 3x with complications from surgery but I'm glad I did it. My husband was feeling the same way as you. So I started going to the gym with him along with keeping my protein level high. It made a big difference. Try approaching you wife with the understanding that you get that she's struggling with weight and is now at a healthier weight. But that's not where you stop and become satisfied. All loss isn't good for you and you just want her to be around to grow old together. Balance is the key. I hope it all works out for you.