No, dev still owns rights to it.
Anyone could make the same game from the ground up with similar-looking if not the same models.
It has been done with way bigger games, there are like 5 different versions of Big Brother around.
I doubt anyone would get sued for remaking and finishing this game, it's just that no one will ever do it, as it's a very small and old game by now, this game is a hidden gem on this site, an old and broken but perfect gem.
Honestly, the hardest part would be finding most of the Assets, especially the Models for the girls and main male characters like Mighty Mack and Officer Cunt.
If someone wants to go through that task of finding the Models for at least Mary, Valery, Kayla, Mack and Cunt, maybe Violet...
I'd even consider doing something with that, maybe finishing the story "early" (as I suspect Flamecito had big plans for the future).
But I could at least try wrapping up the romance plots with the main girls and creating some sex scenes for each girl, plus a threesome with both sisters.
Instead of going forward with the full plot.
I'm still learning Daz, but I believe I can bring some good renders to the table, just need to perfect my abilities lighting the scenes and buy the 12GB 3060 I'm looking into (right now I'm using a 4GB 970, it's the last part I need to upgrade).
I just don't really want to take the task of finding all the models tho.