I've been a netorase fan for years, so to find new games that attract me is actually rarer than you would think, I wanted to give you some encouragement that you are on the right track! I can't support you financially right now but I will do everything I can to promote your game to my friends who like this genre.
One little thing that would make this game from GREAT to PERFECT to me at least, is adding an option to allow/disallow kissing, I know this might need a lot of work so I do not expect it to happen, but I just wanted to leave some feedback! in netorase relationships setting up limits makes it more unique and hot, no one gets to kiss your wife but you, but they get to fuck her face, weird I know, but it is a common theme in netorase relationships.
Now to things I would love to see/suggestions (it is of course only and only up to you) are things like adding chastity cage plays, Kat is already upset that the MC cums early, maybe she can suggest a cage as an option to control the orgasms, that would be very hot and in theme IMO.