I'm not sure why you have any hesitancy... Contact the GM. He/she needs to know. For all you know, the housekeeper may have already had repeated warnings about this, or the housekeeper may be a ten year veteran without any previous issues who made a one-time mistake Either way, the GM needs to know to take appropriate action. If it's the former, the GM may need to cut bait. If it's the latter, the GM may just need to provide a simple reminder, but either way, the GM should know so he/she can take appropriate corrective action.