Having good luck introducing 4-hour EASY with our nearly 5-month old, but struggling to follow-through with naps and nights when our 3-year-old is either interrupting me as I help baby settle or PU/PD crying wakes the preschooler at night. I can't be in both places at once and don't have consistent help from my spouse. As consistency is the building block of PU/PD, I'm not sure what to do. My older son is a good boy, and tries to be patient and quiet but he is 3 and can only last so long waiting. Any suggestions?