Hey, I'm an ex-Zoomie too.
I'll probably catch all kinds of flack for this, but Leptoprin is not a magic pill. It is no different from any other thermogenic you can get from the local drug store. The company manufacturing it is infamous for slick packaging and advertising, but the product is not innovative. I suggest you save your money.
Motivation really needs to come from within. The threat of your hubby leaving IS a motivator, but not a good one. (BTW, what a *nice* supportive guy. Geez.)
You will have to experiment to find a food plan that you can live with long term, but here are a few thoughts:
1) Don't turn on the TV. Once it's on it is hard to pry yourself away. Even reading is better than watching the tube.
2) Increase water. It will help in many ways.
3) Find an activity that you can tolerate daily. Walking, playing with kids or pets, gardening, dancing along with the radio... anything is better than nothing.
4) Look into your meds. They may be adding to your lack of motivation, or weight gain.
Good luck...