My understanding of it is (and this may be entirely wrong), but in Standard NTR you are being cheated on, and/or you are sharing a partner with someone else. So the Reverse of that is someone else sharing their partner with you and/or you cheating with the partner of someone else. This may or may not also include the "stealing" of partners from the person being cheated on.I'm curious how exactly does the reverse NTR work? Is he actively dating someone and getting seduced behind her back?