OK, so here is the scenario...
We have a cleaning lady who we hired to clean our house, an individual person, not a cleaning service - although she also has a couple of ladies that assist her. Last year I gave her a Christmas tip.
But this year I have realized that she is no longer actually coming to clean the house herself, only a couple of other ladies who I have never met (except for a few weeks ago when I took a vacation day on cleaning day) are cleaning. So I didn't leave her a tip this year.
Was I wrong?