The problem is, since you are an adult, if you work for him, you *must* be paid: the law requires all workers, including part-time workers and adult family members, to be paid for working (at least minimum wage) unless they are an owner of the business--only owners do not have to be paid. Since you will be paid, this will affect your unemployment benefits as per your state's rules about working while receiving benefits (every state varies on this subject).