Transitioning between households can be really tough, not only for the parents, but for the kids, too. It's unnatural to be expected to adapt so quickly from one day to the other. It's probably important to keep in mind that they probably need between 24-48 hours to reacclimate. For us, what we do, is post rules and values in our home, so they can easily reference them when they come back. They can know, what is okay at mom's house is okay at dad's house, or vice versa. We also have them go to their room and acclimate. It's sort of like pushing a re-set button when they get home.