C.B.
The only thing that jumped out at me was you said if you don't feed her she stays up and talks and babbles. If she were hungry, she would cry. I'm thinking that she is just in the habit of waking up at this time and if you give her some time, she may soothe herself back to sleep. Even if she doesn't, as long as she's talking and babbling and is happy, leave her alone. It may not be that she really wants to eat, but is just in the habit of waking up.