I have played SL, forgot to put it on my list because you are right, it is a must play and you can fool around with the girls while they're pregnant at least
Incubus and Gaia both look interesting, might check those out. Princess and Vitamin though didn't have any Cheating or Incest tags, would you say there's either content hidden in those games? Regardless thanks for the suggestions!
Hmmm, Renryuu seems interesting, same question as above: any hidden/untagged incest or cheating content? Same for Mythic Manor
Thank you though!