Bug Report:
Clicking on the "main" elevator in the captain's quarters will mute the audio. Audio does not resume upon exiting this menu without traveling (pressing x to return to moving around in the captain's quarters.)
Story Issue:
I was able to access a console scene with Katherine on day 3 where she takes the initiative to give the PC a titjob. Considering the relationship progress at this very early point in the game (GAIA level 1), I don't think this scene should be available so early. I haven't tested other characters' scenes at the console yet.
Suggestion:
Much of the fun with sex (and sexy games) is the anticipation. I think that putting the characters in very skimpy clothes and uniforms from the beginning of the game sacrifices an opportunity for this anticipation and subtle storytelling for the sake of style and eye candy. In short: If you give the girls less revealing clothing at the beginning, it's more exciting for the player when they start wearing more revealing clothing as they play.
In detail: If the girls started in more conservative uniforms (why on earth would naval uniforms include a butt window and why would they agree to it?), but adopt casual clothing after the GAIA breakdown, then it reinforces the idea that they've been on the ship long enough to become lax about protocol. Their choice of when to adopt casual clothing and what they wear speaks volumes about their character without a word of dialogue. Give Adrianna very plain clothes that cover most of her skin and the player knows that she's not thinking sexually about the MC. Once she starts wearing shorter skirts and necklines, they know that there's been a significant, unspoken change. Natasha could remain as she is (at least after ditching the uniform) to contrast her personality with Adrianna's. Natasha isn't worried about provoking the MC's lust so she dresses the part! Katherine wears conservative clothes at the beginning due to her distrust of the MC, but she starts showing off faster than Adrianna because of her secret desire for attention and sexual affirmation.
Another facet of the issue is that even in an extreme situation like this, family members would still take a lot of time and influence to start behaving the way they do in the game, if ever. The player can suspend their disbelief (this is a porn game after all) but if the female characters wear eye-catching clothes from the start, then the player will interpret the characters to represent "porn people," not real people. There's no real excitement from porn characters engaging in incest, since the appeal of incest is largely the process of blood relations being drawn to each other despite the taboo. With porn characters, there's no taboo; we expect porn characters to have sex with their siblings etc.
Put simply (again lol), if Adrianna and Katherine at least wore more conservative clothing at the start, then it would communicate your intention to portray them as actual people, since actual people would wear more conservative clothing around family of the opposite sex. This in turn would make their moral compromises to fill the GAIA seeder and a gradual decay in modesty more exciting for the player.