Damn that sucks, you should try and explain to her the benefits of vaporizing, and when she says no.. Then tell her you will otherwise be smoking out of aluminum cans, to the point in which your premature Alzheimers have gotten so severe that a mention of "Mom" will bring no reaction. Haha JK

But seriously dude if she lets you keep that money you can probably buy a cheap, portable vaporizer that's like the size of a pipe. I mean keeping a big ass thing when your not supposed to smoke is crazy. Go for the small and portable and you won't have these worries.