My 11mo did this for a while, think he was going through a clingly stage. He settled really well in our bed, so i let it go.
He is now back to sleeping through, in his cot, so don't panic she will go back to sleeping in her cot.
Its a phase.. they like to be with their mum. My friend had the same problem, but she insisted on her son sleeping in his cot, not her bed, she was up for hours. At least all I had to put up with was a little less bed....