Tabetha, welcome to the forums. If you work it, 100 pounds can be gone in a matter of months.
It's great that you and your husband are ready to make the commitment to get healthy. Once you set your mind to it, it's really not that hard.
Take the exercise slowly at first and build up your time. When I started it was all I could do to walk 50 ft. (literally!). Now I'm up to almost 1.5 miles in my 20 minute lunch break.
Stick around and don't hesitate to ask if you have any questions or need any help.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.