They say you should never mix family and business, and this story might just be the perfect example of why. After his son struggled to find work due to a legal incident 15 years ago, a retired father stepped in to help. He hired his son at the family business, hoping to set him up for success. The father, now 74 and mostly retired, still enjoys working occasionally and earns a commission for his efforts. But things have taken a turn. The son, now running the business, has started withholding hi…