Good advice. I believe I will get other work from this anyway, as I believe I left the manageress with a favourable impression, and she may spread the word anyway. If not, I've lost nothing.
I remember another situation years ago. I got into window cleaning through another friend. He taught me, gave me a job and we worked together for a few months.
About a year later I was cleaning another friend's windows (she lived in a road where my windy friend had probably half the houses. A guy across the road asked me to do his. I felt very uneasy as I was sure he was my friend's custy. In order to put him off I gave an inflated price. Shock, horror, he accepted.
Some months later I was cleaning this house when my friend drove past. He was livid and gave me some serious earache for weeks after. Can't say I blame him, but I wouldn't wish to do the same again.
John