I had a parent who started off as very reliable but after a couple of months would sometimes forget to get the money available. She had always been a very prompt payer, and I knew she was generally reliable, and so it almost seemed to become a fortnightly payment. But that was because I instinctively trusted her and she never let it go more than a fortnight. I was also aware that the family had other pressing issues at the time. However, if it had gone on longer than two sessions without payment then I would have said that I would not return until I was fully paid up. If the money hadn't shown up within a specified, realistic time, then I would give the slot to someone else. What did the parent say about the money?