...I play on her to get even? You know what I mean, like Vaseline on the doorknobs and such...

i love that.
-maybe u can finish all the toilet paper or hide the toothpaste.
-change the cupboard in the kitchen, u prefer when the tea is under the sink and the cleaning product next to the bread!
-unscrew the toilet seat.
i have always said that if i break up with my b/f ill undo all his socks (they are all black), that will drive him mad. but i can see how u could explain that.
-what about the tv, change the channels order, have a cat for the weekend (they like sleeping in drawers), or just cook something with a lot of onions and garlic and u keep it in the fridge