Don't, my friend, don't do anything that will cause a fuss and arguments.
These games have their own twist, AFH has things like "Netori" that are hard to find because they are rare in Avn's, and before that there was a long burning with mother, which is now all resolved and they already have hot scenes going on...
Milfylicious has its own story, which also takes time to reveal the full plot, not to mention that there is or was too much slow burning between son and mother...
but comparing non-fantastic and with fantasy plot is not a good attempt my friend, each of these three has its own twist and spectacle, but they should not be interfered with in someone else's territory