People tend to be mean if they don't get things going their way. There's the video game dilemma, even in a AVN. How much friction to put to get people engaged but not to push them away.
I'm far from a connoisseur or even a dev in any capacity, but since you are active here let me give my two cents, unrequested. I'm only a 'costumer', lets say, but somewhat exigent one. I'm don't play for a quick fap and done. I want to feel invested. I'm not a writer, but I DM D&D games and spend way too much time on the storytelling part of the game.
That being said, I'm loving what I've seen so far. Specially your art style, composition and the renders. Correct me if I'm wrong, but it's your first project, writing, coding and rendering alone, am I right? I think you are doing an amazing job, giving our position and only being able to do it as a side thing, 3 hours/day at your free time. I feel there's a lot of potential here and hope you get your patreon goingso you can afford a new dedicated rig to give us even great renders. I mean, the best MILF I've seen here.
About the story, I feel like it's a simple one without any big plot and twists. And there's a good thing. If you don't really have that much time daily, getting huge and complex plot might be hard and in the end unfufilling if not done right. I personally like to see development between relationship in a AVN, more so than something weird and big. I don't know if you ever played, but the games from Tlaero and Tora were super railroled and straightfoward. They had some big plot with powers and a shared universe, but overwall what was being developed was the relationship between the MC and LC. Well, I think some of them have almost 10 years so they might fell dated and you'd be right, but those relationships made those games for me. And because of that I remember the games and their names. "I came for the fap and stayed for the plot"
About your story and addressing some of the stuff that has being said, it feels like the assistant is the daughter. It feels like you are setting up for her to fit the shoe. I'm not even found of incest usually, but hey I love Desert Stalker so who am I to judge. I do, however, fear two things. A bait is fine and common, but care to not be too overboarding and frustrate people. If you really want to create a mystery go deeper with it, not only with her. Second, as I read your justification as to how is not even that clear that she is, I fear you might consider changing your plans to make her not be the daugther, if that was your original idea, just to prove one or two buzzing mosquitos in you ear. Not saying that you would do that. What I'm saying is that I've seen way to many people going that route, and as I read that comment, it gave me that feeling. Stick to your guts.
As a final comment, about the Olivia and locked interactions. What I feel it is way too early to have way too severe of consequences of your choices. It feels bad. And I'm not talking about Olivia only. Same with other parts. To have the 'Be rude' to Bob locked behind just on the choice of comment about his wife, on the second interaction with him, is way to rash and way too soon. A scenario that I wasn't a creep talking about his wife, but stressed out and being rude about a sensible matter is reasonable thing to happen. So it feels unfulfilling to have that locked at that point in time. Oliva lewd scene is more reasonable in my opinion, but I think also is way too soon to have it locked behind that much 'score'. (If I understand correctly, there's a score on overall lust of your MC). Because of that, I feel like at this point of the game, that whole interaction better suited to not be the reward to a high lust score, but one to increase it (along side some corruption points if you are going that path). Again, I think it's all about timing here, and setting up the character the players wants. To have that almost set up in the first interactions feels bad. Even if you plan a short game and need things to get going quickly, it still feels too soon, even in a % point of view it isn't. See "Being a DIK". A thing they did amazing in my opinion, in a score based game, is the CHICK-DIK 'ruler'. A single choice doesn't put in an extreme or another. But a series of choices that sowly push you to an end. Most of the time you can chose a dik move or a chick move, and sometimes something big related to the plot is locked behind your affinity, because that made sense in the narrative. Again, with Olivia feels way too soon to have it locked. Because it feels like we are still developing who MC is. And who he's gonna be going foward.
That's that. Sorry about the wall of text. English is not my first language so I get anxyous sometimes to write something besides the usual memes. But something drove me to write it. Hope to reach you in a good way. I only mean weel. I feel there's huge potential here and it's looking good so far. Go nuts nad have fun!
Another thing. Can I ask a personal request? I don't know the reason behind making us choose the name of the assistant. MC is common, but no choice besides to give her a name yourself was awkward to me. I personally don't like naming characters so the best middle ground in my opinion is to have a given name, and the option to change it (to change even that that exact moment in the dialog. Something like "Her given name is xxxx. You can change it if you want."