Are you allowed pets? You could say you have some sort of pet in there and you do not want it disturbed.
Turn off the fans and call it extra storage for clothes?
cover it with a tapestry and it is a meditation closet?
if she can see it she will smell it, even with a scrubber.
My brother in law got beers out of a fridge that was right next to my 3x3 tent. I went through 2 cycles before I told him. He was blown away. I put a weird tapestry over it and it blended in.
Trust me, my pot stinks. When you open the tent, the whole house smells for a while.
i've been running the same carbon scrubber for two years, I wait until the wife tells me she can smell it until I replace it. Ever since her pregnancy, she can smell a two day old fart through a freshly painted door.