Vladislav Perunovic - It seems, since she is a real person, that she should not be removed from the site - rather, she should be connected to the correct parents, instead of the incorrect ones.
If there is a Curator you have had communication with, feel comfortable and trust, perhaps Geni-Message him or her. Or - on the Discussion "ATTENTION Curators, please assist .." http://www.geni.com/discussions/142108 - post most of the info in the second comment above, along with an explanation of who the correct parents are of the half-sister who is listed under the incorrect parents.
