I think you are wonderful for putting forth the effort for Kristen & her siblings. I commend you for being willing to take her in. That is not something to take lightly. (And it is obvious you are not taking this lightly). You are helping the baby and the brother also. Just because you aren't able to bring them into your household does not mean you are not helping them. You are doing more for them than any other adult has managed to do. Best of luck to you.