It's inevitable that 2 different houses are going to have 2 different sets of values, different rules, and different philosophies on life. And you always have to remember that the kids are getting a taste of both, which is great, because ultimately, they are going to get the twist that are most comfortable for them. However, to keep your own home in a sane atmosphere, you have to be really clear about the values that you have, and teach your kids when they differ from Mom's house, that moms aren't bad. They're just different. And explain, specifically, why we choose the values and the rules that we do so that they can understand that, and therefore, authentically adopt them.