uummmm why is he not trained....clearly he knows ....I would tell mom she needs to train him this weekend and if hes not trained by the end of the weekend take the week off and train him. it can be done. I trained my last three kids over a weekend. you put thick training undewrware on the kid and keep a potty in the kitchen or wherever you spend most of your time and he will pee himself a few times and then he will go in the potty....but the parents have to be firm ...and since hes over three and clearly knows when he has to go give him a time out when he soils his pants. when it affects or inconveniences the parents (taking time off work) they will get it done. and yes im not interested in changing the diapers of a three year old and even less interested in getting peed on so I would give notice if they don't have him trained by the end of the easter weekend