Q: Will this be updated more?
A: For bugfixes, yes, if necessary.
UI or performance improvements, probably not, unless there's some serious issue with either.
Content, there's a 1.1 update in early access on Patreon and here on itch right now. Beyond that, depends on how successful it's going to be. If My Naughty Neighbor is popular enough, maybe it'll get another one.
Beyond that, I'd rather spend the time on new Venus Stories or my main projects.

Q: How many other Venus Stories do you have planned?
A: There's also Mia's Bad Hair Day on the MNN page now; apart from that, I have a few concepts for more, but due to time constraints I'll probably focus on Total Maidness! and other more promising projects for now.

The following doesn't apply yet, because Garden of Venus isn't out yet.

Q: I saw Sarah or some other Venus Stories character in 'Garden of Venus', is it playing in the same world?
A: No. It's the same characters (with some minor changes), but in an alternate reality/world. What's canon in any VS isn't in GoV, and vice-versa.
Heck, what happens in one Venus Story isn't even guaranteed to be canon in another Venus Story. They're just a bunch of casual 'what if' scenarios, basically.