Hubby is being uptight
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Only your body can determine really how long you will be out of commission. Your surgeon could give you an estimate of time. Sounds to me like your hubby is the one being selfish - and doesn't want you to lose weight at all. Just my opinion, but if he's been after you to lose weight, and now you do, hmmm, then you might find someone else. He's worried about if you get flabby? What about worrying that you could die from a co-morbidity? Or from the surgery itself?
Before you go any further with this, if it were me, so this is just MY opinion, I would tell him he needs to attend some couples counseling. Sounds like he's more worried that he might be inconvenienced in the short term than he is about you.
It's you I feel sorry for, living with someone like that.
My husband did the same thing. One day he would be all for having it done and then he would not be. The week before my surgery he was furious with me for going through with it. I was actually worried there might be a divorce when it was over. It all boiled down to he was scared to death. He was afraid I would not make it through the surgery, because I have problems with blood clots. He had been hearing alot of negative stories about the surgery from work and a few friends. Instead of communicating with me he choose to act like a jerk. Once the surgery was over and he saw I was going to be fine. The weight on his shoulders was lifted. Now he says he's glad I had it done, because of how much better I'm feeling. Hang in there and be patient. I had my surgery on a Tuesday and I drove the kids to school on Friday (3 days after). Just do a little at a time and don't worry about the rest. It all works out.