Day one as a member of the lung cancer and families of sex offenders groups

I can deal with the lung cancer, I can deal with the fact that my youngest son is going to serve time in a federal prison for downloading and distributing child pornography (he is looking at 5 to 20 years). What I can't deal with is knowing he is not eating properly and there is nothing I can do about it. I really don't like feeling helpless when it comes to the well being of one of my children. I go through my days trying to keep busy and not allow myself to think because when I think, I cry.