The only thing I can suggest is to make the dream feed a little later (ie. 10.30pm) as this may help her last a little longer. Another thing that worker for us was to feed as soon as bubs wakes (ie. 5am) and straight back to bed if I thought this was too early or he was still tired. This works best is it's still dark as I treat it like a night feed. I would only make bed time a touch later if anything as it may not make that much difference. Good luck!