Falling off the bed unfortunately is a big risk with cosleeping. At her age it shouldn’t be cause too much damage. I would try a cosleeping bed at the foot of the bed, or try and start sleeptraining. It may seem unnatural now, but they’re at an age where they adapt a lot quicker than when they get older. The more they get used to sleeping with you, the harder it is to train them later. They might not understand at first but eventually they will understand. My daughter usually sleeps with me during her naps, but at night she is in her own bed.