Monies $$$ part two

Yesterday we had Robert and Clara over in the morning to play while their mom was at the school helping out in her oldest son's class. I didn't hardly see Matthew and Robert the whole time since they went upstairs and played in Matthew's room. Before they finally came down for lunch they were apparently cleaning up and after they ate Matthew informed me that they did clean up his room and he (Matthew) paid Robert to do it!! He gave him a dollar to clean up!! Silly me....I thought we had the money issues covered during the last talk we had!