I'm not a psychologist or have worked in that field, but she might have Munchausen by proxy. It's a mental disorder defined as
"a condition in which a caregiver creates the appearance of health problems in another person, typically their own child. This may include injuring the proxy or altering test samples. The caregiver then presents the proxy as being sick or injured. Permanent injury or death of the proxy may occur as a result of the disorder". Typically it's either for a sense of power or to be seen as a "hero" by helping to try and resuscitate them and attract attention to themselves. Some, though, especially America, do it for financial gain (donations, go fund me and so on). I guess we'll only find out when the psychiatrists get to her. This, if it's true, in no way excuses her for what she's done, but it might help us understand why. To me it's unfathomable that anyone could do such a thing, and I hope she rots in prison for a very long time.