Reassure your children, often, that they are loved and that the divorce doesn’t have anything to do with them. Let them know that, just because, mommy and daddy may not be living together anymore and they may not be getting along your love for them has not changed.
Children are very sensitive to their surroundings and when mommy and daddy are upset they feel it. Sometimes they will even feel that the problem is because of them, especially if they overhear mommy and daddy fighting about spending time with the children and/or what the other parent is doing wrong in raising the children.
