I am sorry for your situation. An adult child is definitely going to be an issue when the finances are this impacted. If his salary left the luxury of helping her I would say that is his decision of whether to help her or not. But if it is a hindrance and he isn't contributing his share in the married household, then the answer isn't that clear. It is okay to want to help your child, but when you are supporting them that is not the same thing. If she just graduated then you are going to have to be sympathetic with a light at the end of the tunnel. You can decide as a couple how much help he wants to give here. This shouldn't be all one person's decision. Find a compromise however painful that is. Maybe he can put a limit on this support both in terms of how much longer this will be and the amount he will provide. He has to teach her responsibility but not make her feel that she has been abandoned. This is a test in how to resolve a very sticky situation.
If this has been helpful press