(A) It shall be unlawful for any person to intentionally obtain property or services of another by threat.
(B) In any prosecution under this section based on a threat to accuse any person of a crime or to cause criminal charges to be instituted against any person, it is an affirmative defense that the person reasonably believed the threatened criminal charge to be true and that his or her sole purpose was to compel or induce the person threatened to take reasonable action to make good the wrong which was the subject of such threatened criminal charge.