Which probably was in German " - hatte sie längst überzeugt" and actually means that she convinced the men and not the men her as the text says.The men from her unit who had initially laughed at her – “The little one with the curls wants to join in?” – had long since convinced her
What I find interesting is the discussion about the length of the story. And I think that illustrates a more fundamental issue of our "genre": If you write a story (primarily) from the victim's perspective and have her (or him, gender doesn't matter here) captured and restraint, then you end up with a protagonist without agency. And if what follows is a never-ending sequence of rapes, then there is neither tension nor progression in the story anymore. The question now is what you want to do: Do you want to tell a story in a traditional sense with narrative tension, a central conflict that needs to be resolved and with characters with an arc? If that is the case, then you need to find a way to give your captive victim some form of agency. If you are not interested in telling a story but purely in writing down a sexual fantasy, then that is fine, too. But I think in hat case you naturally limit yourself to writing something short, like a wet dream put on paper, or risk being repetitive because a captive victim getting assaulted repeatedly usually has no sense of progression anymore.
From a storytelling perspective, the central narrative was Katha's unit crashing in enemy territory. The central narrative question was "Will they escape?" and that question is conclusively answered at the end of chapter 1. From that perspective, chapters 2 to 4 can be seen as the epilogue of the story that tells you what became of the protagonist after the main story is over. And if the epilogue ends up being longer than the main story, you end up with that feeling that the story dragged towards the end.