She wanted to confirm with her own eyes that Aberforth was still in good health. It wouldn't do her much good to discover that the elderly wizard was half-dead. Not only would it make escape that much more difficult with an invalid, but she got the impression that if the man died soon after escaping the Ministry, she would still be the target of the Resistance's ire. No, he would have to be whole and healthy for her mission to be successful.