Hi mcmurry3,
Welcome to the Forum, it’s a great place to share your story and be in contact with others that are in a similar situation.
Until your Son decides he wants to give up I don’t think there is much you can do, it has to start with him, and it must be so hard when his wife is an addict too. Do you have your Grandchild live with you? At least you know your grandson is safe with you.
Read the Theresa thread on here, there are lots of Mums with sons who are addicts, myself included, and it’s a great support.
Take care of you and your grandson first, always know that you are not alone and can always talk to people on the Forum.
Keep in touch on here, take care.
Dx