Your children are not chess pieces in the life you have after a failed marriage, they are children. You don't play one against your former spouse or make it difficult for them to see that other party. Why, because they are not your property and life is NOT a game.
Some people, such as my ex-wife, are all too ready to call the other parent names, denigrate them or otherwise tarnish the image that your children have for their other parent. They will make up their minds on their own. That said, I would encourage you to ensure that if your son or daughter is unhappy with the other parent, try to help them maintain a positive attitude where possible.
