Hmm... okay. Might be coming in a little late here, and I have no idea if the creator watches this thread, but a few things:
Is it possible in the future to ignore or just have a skip function for the scenes with Violet? She doesn't interest me at all. Typical shallow relationship, typical shallow teen and older man stuff. Blah.
A CG room is a must. Being able to see all the scenes from start to finish before starting in on the new update each time would be a major help in terms of overall impact.
More dialogue per scene. At the moment, the scenes with Elasti-girl go too quickly, drawing them out with dirty talk and more back and forth would be great.
At the moment this game is way too linear for a RPG game. You're not alone in this, but it has to be pointed out.
Things i would like to see in the future:
More clothing options as Elasti-girl sinks into depravity. More hidden sex too.
More kissing? This is a common problem, but having sex should include more kissing than it seems to in a lot of NTR games.
Shift the POV from mostly following around the husband to the wife.
You had a condom being used in the latest scene. Lean into that fetish - like what did she do with it, where did it go, have hiding it or otherwise using it in some fashion be part of Elasti-girl's corruption.