There is a big difference between postpartum depression and postpartum psychosis.

Often high functioning people fall through the cracks. They can hide their symptoms well.

This woman should have been hospitalized at McLean's Hospital. Period.

Too much pressure from insurance companies for clients to be treated as outpatient, day programs, etc. Err on the side of safety, especially when children are involved. Insist on hospitalization till stable.

Of course, I don't know the people involved and am just speculating based on my experience from working in healthcare. Just my opinion.

Eta: Husband was working from home and left for 25 minutes to pick up takeout according to NYP (article and comments).