here we go again?

So, the husband used nicotine patches and quit chewing 2+ months ago.  And I know that he really struggled with it, and I was very proud of him.  Then the other day on the way home from the chiropractor, he stopped at the gas station and picked up a can.  I could have cried.  He told me he figured since I had fallen off the ww-wagon for the day, that he could too.  I told him that I wouldn't buy it for him anymore.  I figured since he didn't like to leave the house to shop--like ever--that I didn't have anything to worry about.  Then tonight after he finished work he rushed out the door with clean clothes on and a check in his pocket.  I know he's hoping that I won't realize where he's going and he'll probably bring me something back--a guilt offering--but I'm so frustrated.  We just don't have this in the budget at all.  AAAAAARRRRRRGGGGGG!  Wonder how long he's going to play this she-won't-know-what-I'm-doing routine.