Well, you've covered the entire spectrum of cuckoldry except for "true NTR" where she cheats on the MC without his knowledge and/or consent. Not saying you need to make that route if it's not something you enjoy. Just informing you that there are some NTR fans that prefer things that are actually NTR and not netorase like cuckoldry/hotwifing/swinging.
Then again, this is a "hotwife" game, so I can see real NTR not being compatible with the general set up of "training" your wife. Anyways, good luck.