User blog comment:Imouto-tan/Skadi/@comment-4867780-20150512111156/@comment-4867780-20150513030910

After all this time and thousands of (forced) sex sessions, her brain may be permanently addicted to the sensations, having unconsciously learnt to take pleasure in it to make the experience more bearable, and getting caught up in it until it becomes part of her psyche.

After escaping and getting her revenge, she would become an eroge writer to satisfy this addiction inherited from her years of captivity, in a safer and (relatively) healthier way through fiction and identification.

Put it like that it's actually believable, and would immersively explains the use of such crude word in her backstory.