Overly physical and dangerous playing?

Two friends and i have toddlers the same age. They are 29 months old. The boys play nicely, either on their own or sometimes together, The girl is much more boisterous and physical. Unfortunately, she can't leave the others alone and either grabs at their toys or wrestles them to the ground around their neck. She pushes really hard and they are always crying because she hurts them. She is really dangerous to the baby too, she tries to put large toys on her head and has hurt her. She just doesn't stop moving and laughs even when she is reprimanded for her behaviour. It is so draining to be around and I am in constant fear that she will hurt my son. As I said, he is made to cry by her every time we meet. I don't want to stop meeting up with my friend but it is really stressful for my son and I to go there. She pesters and badgers them all the time, snatching at their toys, putting things on them, hats and so on, pulling on them, sitting on them, squeezing them etc. She runs everywhere and is usually wielding some potentially dangerous toy (ie heavy). What can I do? Should I stop seeing my friend for a while til the daughter calms down?