Hmm. hard to say. Some husbands are really uncomfortable with their wives losing weight simply because they have their own self issues.
Other husbands just don't think, period.
Some think, but just don't know anything about what their thinking about.
For example: when my husband I first got together, I was following Weight watchers, for the umpteenth time. He couldn't get his head around the points thing. He would come home with things like Big M lite--(chocolate milk similar to Quik for the non-Aussies here.)
Now, his intentions were good--because it was "lite" he thought he was doing a grand thing bringing me a treat. But he just couldn't understand that just because it said "lite", it didn't mean that it didn't have a gazillion points in it. We would argue over this all the time, and eventually I caved and gave up WW, for the umpteenth-eth time.
And then there would be the times that I'd lose a good size chunk of weight for the week, and his idea of celebrating would be a huge family size pizza with the lot (everything under the sun) on it--not going to see a movie sans popcorn, or me going shopping for something new. Rewards in this house seem to revolve around food! He would say that I should be able to eat some without it doing any harm--I would just have to be extra careful the days afterward. Everyone knows that on Weight Watchers they don't promote "credit" with points.
I think he truly believed that it would make no difference, and that because I'd lost like 3-4 pounds the previous week that I was on a roll and the fat would just fly off--I WISH. But he is the type that doesn't put on weight easy, and when he does it comes off super fast, which I personally think should be grounds for divorce but the courts don't agree!
j/j
But sometimes I think husbands can be trying to sabotage you, but not be aware of it. Like a subconscious effort. Maybe he's used to you being the way you are personality wise but with a weight problem, and he thinks if you lose the weight that YOU will change in personality too. it's a very complicated psychology when weight and confidence/esteem issues are involved.
Perhaps try talking to him in a non-agressive way, or have your GP or dietician speak to him. What could it hurt?
Good luck!