Hello Customer (name blocked for privacy),
Your husband's divorce says that your husband has physical custody. Their mother is ordered to pay child support. That order continues, unless and until the court changes it. Now, the children might go back and forth or whatever, but unless the ex-wife goes into court and gets the divorce modified, she will still owe the support at whatever level that was ordered in the divorce. In other words, if she was ordered to pay $500 per month (just an example), whether the children are staying with her, staying with him, or going back and forth---that $500 will continue to add up unless the court changes the divorce. If the ex wants to change it, she will have to file a Motion to Modify and then have him properly served and give him a chance to file a response.
Modifying a divorce is not an easy thing to do.
If I've helped, please click Accept so I can get credit for my work. This is informational only and is NOT legal advice. There is no attorney-client relationship. You are advised to consult an attorney in your state for specific legal advice.