I've learned to just be direct with mine. It can be difficult at first, but sessions should be about what the client wants to discuss, not the T. Sometimes I'll say something like, "I don't want to spend the whole time talking about this." Or "I have some other topics to bring up." Or if he's sharing an idea he's told me before that didn't help, I might just say, "Yes, I know, you told me about that, but I need other ideas" or something to that effect. Then, as others have said, if she still insists on talking about her own thing regularly, might be time to look for a new T.