awww maybe you should just ask if you can have her?
what do the other kittens look like?
it looks like one of the parents has a siamese gene... the kitten looks sorta like a siamese cat... aside from the dark face.. but the blue eyes and white hair are def trait of a siamese cat..
That looks like a blue-point Birman (see my avatar). I have one and they're gorgeous and total darlings.
Does your sister have plans to get the momma cat fixed? No offense, but the world is filled with beautiful, sly, and wonderful kitty cats. There are few responsible explanations for having pet cats breed.