My coworker told me that a bi-annual event this year would be "my baby" - her words. She specifically said that nothing would need to be done until now (November), and would help me through the process.
I've asked her for information about past events, about what is expected for this year, etc, and got some information, but when I ask for more, like actual spreadsheets and budgets and receipts from the past, I get told that I don't need it yet. When I bring up the menu or float an idea, I get shut down. I just heard her speaking to our boss about the project and he's asking her how it's going, etc, and she said nothing about it being handed over to me. She has a folder on her desk for the project but "there's nothing" to give to me.
I want to start making plans, but I don't have anything I need to do it and my coworker seems reluctant to hand it over.
This is something I was really excited about when she told me it was my responsibility, but now she's not letting me do anything, and it's really frustrating, because I'd like to budget my time for this but if I don't need to, there's a bunch of other things I can take care of. I really want to do this, but I don't want to waste my time.
How do I politely say that if she wants to do it, go for it, but if not, back off and let me do it?
Edit: To clarify, I was hired to take over her position over a year ago. This is the first time the event has happened since I was hired, and she has delegated her past responsibilities to me as they've come up, along with instructions, etc. She's the one I'll have to resolve this with.