3 yo peeing on the floor to punish us

When my AD was 3 she tried the same thing. It didn't get the desired effect. When she was sent to her room and trying to find an excuse to come out before her time was up,she would pee. I made sure she had a box of wipes and some paper towels. She could clean herself, put her clothes in the bin and clean the floor without ever leaving her room. She only did it for a few weeks and maybe only 2-3 times a week at that. Along with her cleaning it all up, she got miss out on something fun or some treat that everybody else got to eat. Nothing like missing out on ice cream,which mysteriously appeared when she peed, to motivate a kid to stop.