Assalam alikum,
Hope you are  in the the best  state of Iman health. 

just want to ask if my husband still have responsibility to his Ex wife?  My husband   Secure that his son and his ex wife have a house to leave, he give money for child support every month. He also pay for the house maintenance, utilities  including phone bills. Is his ex wife still have a right to ask  for extra money to my husband. I’m confused about it. 

jazak Allah khair