Yes, I completely understand. My husband seems to be a bit more understanding than yours, but he still picks up treats and eats them in front of me, etc. One thing I have learned is that you can't expect everyone around you to understand how hard it is and to change their lifestyle with you. I mean, be honest, if you didn't have a weight issue, would you ever give up yummy foods? I wouldn't.
That being said, your husband should at least TRY to make things easier for you. If you haven't done so already, sit him down and have a serious discussion with him about how hard this is for you and that you could really use some help. Ask him to get his treats in when he is out of the house and to not bring bad, tempting foods home. If he won't at least pick up healthy foods for you along with the bad ones, make sure you're doing the shopping. In fact, do ALL of the shopping. Pick up foods that work for your diet along with some treats that only he will be tempted by. I basically get the treats that my husband likes but I don't. That way he has something yummy if he wants it and I don't care. It really helps. Also, this may seriously be an effort on his part to actually sabotage you. I remember my husband expressing to me once that he's worried about the change. About me getting all skinny and leaving him, or my personality changing, etc. Make sure this isn't an issue with your husband, and remind him of how much more beautiful he'll think you are once you've lost all that weight. It's a win-win situation, after all, and he should help you as much as possible.
I guess it just has to work both ways. You're never going to live in a temptation free world, and will-power is probably the hardest part of dieting. It would be nice if he could refrain from eating anything bad in front of you, but it probably won't happen. Just make sure that you have heathly alternatives in the house. If he's sitting there eating cake and you're dying to have some, it helps to have a little weight watchers cake on hand. Or some sugar free ice cream, etc. I've found that even though I can't always stop myself from "cheating" I can lessen the impact by choosing better treats. There's no worse feeling for me than sitting there hungry with no food watching my husband gobble down something delicious. You must have choices on hand that will help you feel satisfied.
I hope this helps... =)