Next Sunday: Katherine doesn't want anyone to find out "we're doing this" (spying on Dave? Let's hope!). Lynette's marriage is in trouble. Bree has issues with Danielle, in the form of telling her son to lie. Dave gets even creepier, and Mrs. McCluskey points out to Edie that she knows nothing about him. And Gaby and Susan appear to get into a physical fight over MJ's lack of balls (the figurative kind, I'm sure).