First of I like your novel game. I love the story and the psychological analysis of the situation as well as moral discussion in if or when this is ok and when not and as you point to the cause of what is the trigger to this situations. I believe it to be as much of a kink and fun as it can be therapeutic.
I believe games are great way of living out your fantasy with no damage to your fellow people as long as it stays in the game. And I love to have options when things heat up, it's not just about script and your views, it's about the kinks I am into or other players. On that note I like you to consider adding more options. Even those that will go too far and go into the story just enough so it can emphatically reflect on the choice of the player (like loosing your cool and pushing things that will inflict an reaction that will make a person end the story(in more then just 'the end').
I noticed that you had very closed variety of erotic acts involving classical touch, lick, boobs, feet fetish and vaginal. I for once never was into feet fetish but understand that it can be a thing. but there are more things you could add, cant believe you left out anal. You might not like it, but most novels barely touch it by adding 2 out of 100 acts. WTF. I also like to have the option to choose what kind of kink I will develop/experience, the novel story is yours as the flow of action is set by you (unlike some RPG kind of game like Midnight Paradise or Treasure of Nadia, where the the pace and booty call interactions are available outside of the story flow - not limited to a week like with Petal). I understand that this involves more extra scenes to be developed for each option (the feet scene was offered twice once for the story and second as a choice). I liked that you have those after Petal playfully implies 'since you liked it so much last time'...
I hope you can implement those things as I liked your stories and I would like to keep buying/supporting you make them. It's irritating to get the itch on your back and not able to scratch it (pound intended).