Give her some time--how does your other dog feel about her?

If it's just the hair, get her groomed and bathed. If you keep up with the brushing, it won't seem so bad. Trust me you get used to it! I have lint brushes scattered throughout my house, office and truck! Also remember that she is likely still blowing off some of last winter's coat. My huskies look a little mangy right now, but once the cold weather comes they won't shed much til spring.

But if it truly doesn't feel right to you--take her back before you adopt her! She has a nice foster home and is safe there. If she's not the dog for you, she will be for someone else. Not fair to any of you to keep her if you don't truly want her.