Got a customer into his 2nd year with my service. Been a good/prompt payer. Has purchased some additional services and has done some on his own. Always seemed pleased with the job we did. No complaints. Just recently asked to have the cutting height lowered so we did. Then he calls up and says "Don't need ya to mow it for the next couple of weeks I am putting weed and feed down". I explain that putting weed and feed down will make it grow faster not slower and that mowing is a must otherwise he will have a jungle in two or three weeks. He then says, "Well actually there is this friend of mine who is a kid (teenager I think) that owes me some money. So I said he can work it off in the yard". I then ask if he is dropping me and the kid taking over? He says no. It is just for a few cuts until this kid works off his debt. How would you all handle this?