I don't believe it's possible to edit existing scenes, but you can create your own. There is a fairly active community of scene creators on the discord server, with an entire section dedicated to non-consensual stuff if that's your jam.
Being a Jar file, I'm pretty sure it can be decompiled, altered, and recompiled. What I'm not sure on is how to do that, as I've never worked with Java, and it could be that it is a very hard road without source files that haven't been provided. Or not. I'm not sure. I'm no programmer, but I've edited other games before, just editing their text and other extremely small things, but I've never tried Java.
I know there is a fairly active community on Discord, and I mean this with the utmost respect, because I think they have potential, but I am not interested in working there in the slightest. I've tried working with SO directly before to no effect, because he wanted me to understand how to code and code things on my own. The discord is the same way- if you don't have a significant understanding of coding, you're not going to get anything done. There are some people that might be interested in what I'd like to do, but in both the regular part of that Discord and the NonCon area, while they might give helpful pointers, they still want you to write and code it all yourself. Sorry, but that's a shit system, and you only need look at what has been released so far to know it's a shit system. What, one scene, or is it two, have been released using that system since it was created, and I think it was created last year? There's a lot of talking, and a lot of individual people writing individual, 1-time scenes, and then refining them over and over, and them never even making it in the game.
I've not the talent or interest in coding, especially not some secondary third party system that requires two files, approval by SO, to create massive 1 time scene that people may or may not be able to access because it's so complicated, and that's assuming it ever makes it into the game. What I ~do~ want to do is decompile the game, and mess with, not the lines of code, but the text that makes up the game. This isn't my first rodeo doing that job, I'm fairly good at it despite a lack of coding, and that method (assuming I can find anyone to tell me how to or help me do it) has some advantages: I can edit things that affect the entire game, not just create a 1-off scene most people will have trouble triggering and may not fit with the rest of the game. I can edit the very feel and actions of the game, descriptions, etc. I can edit in much stronger, more abusive or BDSM type content, which I'd like to see and will never be added to the main game. The ability to affect the game on a base level and give it a overhaul shouldn't be underestimated- I think it's high time writers did that. No offense to SO, or to people trying to add scenes on Discord, but the bulk of them are more coders than writers, it seems to me. The systems seem decent, the text is passible- it could be a lot better, and I'd like to work from that angle, if only in my own genre.