My heart and overwhelming respect goes out to your DIL.
When a pest-control operator used a high pressure spray on the external wall of a hospital's A & E department, countless cockroaches - normally hidden from public view - came pouring out of the cracks & crevices.
Very high pressure is being applied in society at the moment - pressure which is revealing that there are many more "cockroaches" in our midst than we'd like to think. Your DIL is one of the many unacknowledged and unselfish angels amongst us. Give her our best wishes.