never been in that situation, but you can be pretty certain that if she hasn't paid then it probably because she can't. She doesn't want to have to dodge your bill any more than you want to chase her down for it. I would give it a week and then stop by. also when money is tight, fridays are the best day to stop by and the 15th and 30th(government and SS pay days). More likely to get something when they have it.