Most people would not enjoy having to clean up someone else's food that they threw on the floor and so that makes babysitting a painful task and being proud about it does not make sense.
Consider the statement "I was babysitting my cousin few days ago and she kept throwing her food on the floor.". Based on this "I was so proud when my cousin threw her food on the floor and it made me absolutely want to babysit her again" a true statement? Yes, no, or I don't know?