If that person is still on parole or probation, often times a condition of a person's probation if convicted of a sex crime is to have no contact with minor children. If the person is not on probation or parole, then obviously having contact with minor children will not cause any violations. The sex offender list is geared toward giving the public notice of a person's sex offender status, but in of itself is not a complete bar from a sex offender having contact with minor children. If he's on probation or parole, then it will be a violation of that probation or parole to have contact with minor children and live in your home.