So, keeping in mind that Edwin often quotes the rule he's breaking - as he's breaking it...

Last night, Edwin was eating M&Ms and Kayra was eating Skittles.  We suspect Edwin tried to swipe one of Kayra's candies, having finished his own, and not realizing that they were not the same.  Then, we suspect he ran to the potty to spit it out, a popular routine for him.  It got quiet upstairs, and Michael, getting suspicious, went to check.  Then, we hear from downstairs, "Edwin!"  Michael had caught Edwin with a paper cup, poised over the toilet.  Edwin quickly dropped the cup into the toilet, saying "Do not drink the potty-water!"  I arrived upstairs to hear Edwin saying, "I am sorry for drinking the potty-water."