Bath Problems

Two weeks ago Caelan and Elie took a bath together and the dads were supervising.  They are pretty sure that Caelan was the one that pooped...  I don't know if he was so grossed out by it or if it's because he saw Uncle Nick's reaction but Caelan won't take baths anymore.  If I take him in the shower with me I have to hold him.  If the bath is full he will gladly play from the side but if I try to put him in he grabs onto my neck and yells "no pee mom please no!"  I am hoping it ends soon.  Swimming lessons start this saturday and I really hope it doesn't happen with the pool too.