Until She Returns

This is an alternative ending to this Light of the dark, this will be an x reader. I'm not very good at x readers but I think I'm getting the hang of it. Anyway to the summary of the book.
After the demise of Kars' mate, he took over the world, reverting it back to its natural state. Where there are no cities and no factories. The earth began to heal but the Pillarmen's world never did. He was stuck on the memory of the midnight/black haired women. The four of them each took a piece of the world. Wammu and Santana took North and South America, with Wammu being North and Santana being South, Esidisi took Africa and Australia, Kars had taken Europe and Asia. He mostly stayed in the Europe. Switzerland, to be precise, where he and the pillarmen hid when they fought Joseph. (Name) was just an average girl though her parents sold her into slavery for drugs that a human minister was creating. She was a slave for the minister for awhile but every so often the ministers had to give tributes to Kars for letting them stay in power. This one decided to send (Name), as she started to work there she met another girl in which they quickly became best friends. Her life was normal that is until Kars' personal maid had become his mistress, again. It all got turned upside down and even though she shouldn't. She began to feel sorry for the pillarman as she delved into who his mate was.