If she goes to a mental asylum for her crimes – that means that she can claim insanity as a basis for committing those crimes. Therefore, that is not a good idea. She was in her full mind, and intentionally committed the crimes, and she should be imprisoned for committing these crimes knowingly and intentionally (in some cases, with obvious motive). Too many defendants claim “temporary insanity”.
On the other hand, it is quite difficult to get out of a mental institution once institutionalized – so perhaps that’d be better. Even if she’d be pardoned by someone later on, it’d be from a mental institution.
Anyway, it’s neither here nor there because it won’t happen.