Mother's little helper?

Dinner was over, the trash was overflowing, and I grudgingly had admit it was time to take it out. Again. Both Fiona and Nora were dressing up and dancing with wild abandon in the front room, so there was no time like the present. I took off the lid, only to discover four wadded-up one dollar bills in the top of the receptacle.

Hmmmmm... If Nora is "helping" by throwing away cold hard cash, where is she getting it? How often has she done this before? In what other ways has she "helped out" around the house by "tidying up"? If she IS actually trying to be useful around the house, how perturbed can I possibly be? And lastly, if I dug through this entire, gooey bag of refuse, would I find any more money, and would it be worth it even if I did?