Things should pan out once he is out of the shock of his mom is about to die has died down. I say give him the time to collect his things and set his mind right but don't leave him fully, make sure you are there to talk to him when hes ready to talk. I have been there with my grandpa who was more like a dad to me and when he was in the hospital, I wanted nothing to do with anything besides school and locking myself in my room. It took some time to come around and talk to people again and once he died it kind of started over again. Its going to be hard so be ready to rush to his side when he needs you.

As for you good sir, just relax and stay online and have your phone ready. He knows that you are there for him and you will be one of the first people that he will call when it all comes crashing down.