2006 New York Code - Modification Of Judgment Or Order In Action For Divorce Or Annulment.

 
    §  248.  Modification  of  judgment  or order in action for divorce or
  annulment. Where an action  for  divorce  or  for  annulment  or  for  a
  declaration of the nullity of a void marriage is brought by a husband or
  wife,  and a final judgment of divorce or a final judgment annulling the
  marriage or declaring its nullity has been rendered, the court, by order
  upon the application of the husband on  notice,  and  on  proof  of  the
  marriage  of  the wife after such final judgment, must modify such final
  judgment and any orders made  with  respect  thereto  by  annulling  the
  provisions  of  such  final  judgment  or  orders, or of both, directing
  payments of money for  the  support  of  the  wife.  The  court  in  its
  discretion  upon  application  of the husband on notice, upon proof that
  the wife is habitually living with another man and holding  herself  out
  as  his  wife,  although  not married to such man, may modify such final
  judgment and any orders made  with  respect  thereto  by  annulling  the
  provisions  of  such  final  judgment  or  orders  or of both, directing
  payment of money for the support of such wife.