Seeing as how Elle is a model and has like no meat on her, I don't think she has the strength to fight well. Being on hormones long enough makes all those male muscles disappear, so she has no advantage, and she weighs less. If Kelly can get her on the ground and get on top of her, the fight's pretty much over.
Not to mention that if Elle hasn't had bottom surgery she has a bit of a weak spot between the legs...