How do I stop my spouse from fighting with me in front of the children?
Ask the other spouse to please refrain from discussing any adult issues within the hearing of the children. Make yourself available to discuss your spouse's complaints, frustrations and/or concerns as soon as possible.
As it is an issue that your spouse believes to be important, don't put it off. Instead, give an alternative setting in which to air complaints, frustrations or concerns. Consider sitting down with the spouse before the first visitation period and asking to formulate some ground rules by which the two of you will discuss issues pertaining to the children and issues pertaining to property. Your lawyer can help guide you with an agenda of items to consider and present.