Same; almost every other game seems to have it, so it is nice to find one that does not. Until now. It is very much not for me, but I appreciate the willingness to try new things.
Also, the major difference between NTR and regular cuckoldry is consent. There is no consent, and often no knowledge on the part of the one being cheated on in the case of NTR. Whereas in cuckoldry, the other person is actively aware and is ok with it. To that end, cuckoldry isn't really cheating.