I know you know it, but guilt is such a wasted emotion. What I see is a beautiful relationship where you can be open and honest with each other and when you learn something, which you couldn't possibly have known without communicaton (the homesickness), you step up and do all you can to provide comfort (big hugs and chats). Your daughter knows you are there, that you have her back. That the love is real and that you are her safety net. Heck, there's no guilt in that, there's only love, power and safety. Be proud of yourself, you sound like a wonderful mother!