Yeah i am try to set the relationship too.
The first choice say how you will addres Kara, Keren and Kurt? The first two are cleary girls, but kurt is a male right? Judging by the name, definitely a man. So if i wanna be a brother, how i need to addres them? sisters? But in this case Kurt is the brother?
Also if you wanna do the Dad things, again, another problem, with kurt again, you cant write daughter... because Kurt in that case is the son?
And also if you wanna do the Uncle... again... You can write Nice again... because of kurt is again a male and a male is a nephew
Therefore the relationship system must be slightly adjusted. Because as it is it doesn't give you full freedom of choice.
There would be a simple way, insert a secret keyword in the first choice, using that keyword, the game will automatically set relationships with all three. This is the only alternative I see that is simple to use. Like in the Dark Magic game. If you put truestory, the game changes the relationship, without doing anything.