I had the same problem with my son, so what I did was take the pillow and blanket off my bed and put it onto my son's bed.
I felt if he had his mother's smell with him, he would feel more like sleeping in his own bed. Plus I also took him to the store with me and he got to pick out a stuffed teddy bear which we called his sleep bear.
It took awhile, but I am happy to say that he is now sleeping in his own bed now.
Well, this likely will not be an atractive notion to her, no matter what you do. However, you can proceed nonetheless by remaining steadfast and setting a firm limit. If you wish, you can accomplish the goal in stages. First have her in her own bed and rest with her for a brief time for some days, then move to being seated next to her for a brief time, e.g. Establish a date by which she will be expected to fall asleep in her own bed by herself after the customary rountine of story, quiet time, etc. This can be regarded as an accomplishment, even having a little celebration - e.g., with a little cake to mark the occasion. The key will be for you to be resolute, even in the face of her opposition. Yes, it would be easier if she were more positive about it, but that's too much to expect.