I refused the job in the politest way possible and got on with my life and I cut that whole branch of the family tree out of my life.
When I was a kid he'd always show off how much money he had, in the end it cost him the life of his son (killed by another mobster) and his family. I hope the money was worth it to him but I doubt it.
edit: so, I just received a message via email about my 'callousness' with this comment, let me clarify: if you push your wife, son, daughter into crime, get your son killed and attempt to recruit other family members into your crime empire then the world is (much) better off without you.