Your game is really very good. Congratulations! Just leaving a suggestion in the next netorase sharing plots would be cool and exciting if it were shown, for example, Mary or Fred or both researching the lifestyle of the cuckold/hot wife and, for example, Fred confessing that he always had cuckold tendencies and that for him it is very emotional and explains that it will be healthy for the couple, something along those lines and with "dirty" or exciting dialogues between them.
And also as a suggestion, for example, that in the sharing scenes show Fred holding his wife's hand in support, something similar to what has already been done in other games like Duet Couple. Fred masturbating while watching Mary get fucked would also look amazing.
Another excellent suggestion would be a scene where Fred and another husband also with cuck desires becoming friends and share their wives watching their wives being fucked by other guys and commenting on it
I think everyone who enjoys the theme loves this type of scene.