Is there any incest patch?
Like others have said, that's a major negative for this game/VN. The way the story is written, any incest content/mod would require a massive story rewrite, as well as a big load of new renders, so I don't see it happening for WVM, ever. There are a lot of other games/VN on F95zone that either has incest built in, or can easily be modded (due to household/relationship structures) to have this enabled, so if this is a requirement for you, just check the "Latest updates" page, and add the "incest" tag in the filter menu (right side). This will show a list of games/VNs that has this possibility, either "natively" or with a patch/mod.
Like I've said earlier in this thread, I'm usually a fan of games/VNs with such contents myself, but WVM has been a breath of fresh air for me, even without this content possibility. In any case, there are 3 women/girls who are regarded family, and are "off-limits" in this story (in terms of sexual relations), and that's the adoptive mother, the long-lost biological mother, and the long-lost sister (I'm not spoiling too much by saying that there *is* a sister, but I'll let you play the story to find out who yourself).
Then again, if you play the game juuuust right, you'll have sexual relations with probably up to 16 different girls/women (I counted from the published character sheets, so I'm not 100% sure), just in the published release alone (version 9.4.2), with two of them potentially being transwomen (this is an option you set when you start the game - if you choose Shauna to be trans, then one other character will also be; you can also set them to be regular women/girls, if that's your preference), and 4 of these are classified as "Rachael's clients" (if you play the story far enough, you'll know what I mean) - and these 4 are only accessible in *this* release if you play the story in a certain way (I believe this is the "cheat path" in the walkthrough). If you play the "loyal path" in the walkthrough, you'll have the potential for sexual relations with 12 girls/women, where two of them are 100% unavoidable (your "original" girlfriend Jamie being one of them). In this release, I also counted at least 7 additional women/girls that you most definitely may have romantic/sexual relations with in the future. And this is quite impressive for a story that's only 9 days long so far, I would think.
Let's just say that there's plenty to pick from, and in this case, your 3 family members play more or less a background role in the story, compared to the others.
And I haven't even touched on what might potentially happen with Willabelle's rainbow squad, if anything (they have their own entries in the character sheets, but you haven't really met any of them yet by day 9, I believe - I actually haven't played the "cheat path" myself yet, so I'm not sure).