SixthSense1029
Sorry to say this bro, but I am not accepting FL personality and her view over having Harem for the ML. . . . No women would want her loved one to have harem and that too because she just wants few sisters. Come on girl there are other ways you could get a sister. No need to share your man. Well that's my opinion.
It just doesn't make sense considering how you described her character in the first chapter. You said she knew him for the longest time and that she had an unrequited love. She finally obtained the affection of the person she loved and then the moment she goes to another world she wants a harem. Come on bro.