Netorase is probably the closest to the traditional cuckolding. People who practice cuckolding irl invite people they know or are reliable to fulfill that and often do swinging with other couples,the situation that happens in ntr games almost never happens.And netorase is basically cheating with consent so it's hard to place it,it's somewhere between swinging and cheating.If that still happens then it is only because there is only a "NTR" tag and the tagger don't know better. I don't know how netorase is tagged now but netori are not tagged with NTR but with Cheating. If Tags 2.0 comes out then it will be clearer.