a very strange situation

we had been told that natalya has a sister but doesnt know her and she is far away.and now we found them on the government website for kids who need to be adopted and it shows her sister is not far away but is a child we met last year when we were there. so now do we bring home "our girls" and not the sister? breaking up sisters? bring home one of our girls leaving the sisters? our girls are best friends so someone is going to get their heartbroken no matter what we do. Unless we can come up with the funds to bring home the sister too and decide we can indeed deal with her needs.