We haven't actually been told yet what she is alleged to have done to baby G on this third occasion.I am not for one minute saying that it does. I'm looking at this incident is isolation.
She had what seems like the perfect opportunity to kill the child, probably completely undetected, yet took actions to prevent her from dying - and she did not die.
Now, perhaps she did have the intention to kill her and then changed her mind but I don't see any evidence to support that.
It's not just a call for help and a monitor being off. There will be medical expert opinion to follow, based on nursing/clinical notes (like blotches or x-ray showing gas in the stomach or something) about the cause of the collapse.