I also think her being annoyed at not being allowed to do meds after that very serious and nearly catastrophic incident shows just how self-centred and cold she is.
Surely the normal reaction wouldn't be annoyance. It would be shock and fear at having nearly been responsible for the death of a patient, in this case, a vulnerable baby. That should have been a huge red flag. If I'd made a mistake like that I'd never, ever want to administer medication again. Why didn't anyone note that that was a strange reaction to such a potentially fatal incident?