I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
So long as your son and his wife are married, she has no legal control over whether he brings the baby to see you. The fact that they may be separated, and that he may live somewhere else for the time being, doesn't make a difference.
If you want to, you can also hire an attorney in the state of VA and apply to the court for visitation under the laws supporting Grandparents Rights.
Either way, you can get visitation with your grandson. You will need to convince your son that he is not legally obligate to follow the rules that his wife may try and make. The law grants him the right as a father to allow you to see your grandchild if he wants, and the mother
cannot stop that. Or you can apply to the court for your grandparent rights.
You may reply back to me again, using the Reply to Expert link, if you have additional questions.
I wish you the best in your future,