Spoiler warning for anyone reading comments preemptively. Game is good, go play it.
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A "Man of the Woods" named JT, huh?
Questionable (probably unintentional) needle drops aside, I thought this was a fun twist. The realization that "David Hart" wasn't Timber's companion but rather more than likely some dead dick that fucked around and found out was a really fun little misdirection. Love the line "You are such a good detective" after the David Hart bit and its irony with full context.
I generally like the way the relationship is developing, though I think there could have been a BIT more hesitation or tension with some of the reveals as to Timber's nature in this chapter. Like obviously we, the audience, and you, the author, are okay with whatever Timber is doing because we're here for a furry romance fantasy story, but the shift from "OH GOD" to "eh this is fine" seemed a little quick for me for how severe some of the implications were. I don't think it's something where you necessarily need lines upon lines of introspection, but maybe some more moments that are awkward, uneasy, or uncomfortable. Like when MC and Timber are having dinner and MC realizes Timber is eating human tartare, let that scene develop a little instead of immediately changing the subject. It's kind of a major thing that both characters have to adjust to, especially so for the MC.
Otherwise I'm having a good time with this and considering how much seems to be planned I'm interested in seeing whatever additional twists and turns might be coming.
Didn't really notice any typos except for one in one of the lines you added to give MC a reaction to the deer stew. "veering" not "vering".
Couple other comments on Timber:
"Timber just smiles at you, unaware of all the hate in the world" - this is kind of a weird line considering the conversation that immediately precedes it about them getting literally shot for (as far as we can tell at this point) her appearance. Is this supposed to indicate they're momentarily unaware of all the hate in the world?
Sex stuff - how does Timber know what the word "cum" is? Or the concept of "riding"? Like, I understand that instinctually Timber has lust and desire, so the river scene makes perfect sense to me (and I did really like that scene), but them being like sexually aggressive doesn't necessarily track since everything they've learned about the world is through JT, and that would have been a... choice to teach your pseudo child. I think it might work better to have MC's and Timber's first sexual encounter happen more organically rather than Timber being so blunt about it at the end of the chapter (which is also kinda tonally jarring anyway). If you're stressing about MC preparing for male Timber, you can still have the first encounter be spontaneous, but just non-penetrative.
Lastly, unsolicited writing advice for this chapter:
"Show don't tell" is like the most basic writing advice that exists, but it may help to recontextualize it as "letting the scene speak for itself".
Ex. "Timber's world comes crashing down around them. The walls they've raised to protect themselves crumble."
You don't need to directly state this. Focus on the imagery of Timber's reaction in the scene and let that convey those emotions. You're already good at doing this (probably better than you realize) and swapping out those lines for maybe another few details about Timber's actions and expressions in that scene could go a long way (like maybe show how they "surrender", collapsing on MC and sobbing or something). An editor told me once with a similar issue "have a little faith in your audience" - we'll get the point :)