It feels really awkward criticising when I have no suggestions to make on how to fix it, but I have to bring this up as it's a complete immersion-ruiner.
While I'm not a fan of incest, I don't really mind it too much and am grateful that the option is there to have it replaced with Totally Not Incest, I Swear ... the quality of the dialogue takes an utter nosedive whenever the topic comes up. Most of the time, I quite like the dialogue, even the dialogue between those characters when they're talking about being friends (or I assume siblings w/ patch) flows nicely and is believable. But as soon as the scene gets sexual, the dialogue gets unnatural, awkward, or self-conscious and just feels out of place. Why is it that incestual scenes always seem to have to remind the viewer WE ARE RELATED, AREN'T WE, BROTHER [replace: CHILDHOOD FRIEND] twice a sentence? No other character gets this treatment, we don't get to read scenes with Robin which include lines like "OH FIRST OF MY HAREM, YOU'RE REALLY GOOD AT THAT."
Surely anyone for whom the relationship is the important bit is capable of remembering that without the awkward dialogue? I don't need reminders that Mia has some sort of trauma making her scared to sleep alone whenever I say goodnight, it's important to me so unconsciously present when interacting with her.
Why does incest (and by extension, find/replace Not-Incest) get treated differently? And why does that difference seemingly have to be such awkward overuse of pronouns?
Edit: that said, I'm quite enjoying the game otherwise, especially the mechanical changes made last patch and the characters are interesting and believable., the writing is really nice. If I didn't like the rest of the game so much, I would have declared not my tastes, uninstalled and moved on, it's just weird seeing such good writing with one jarring difference.