Where I work, only parts of the chart are given to the family to see. Things like lab results and copies of consents.
Xray or CT results, biopsies etc., need to be gone over by the doctor prior to being released.
Our doctors come in at different times of the day or evening, depending upon when they see patients and how many are scheduled in their office that day.
Our hospitalist patients always have a doctor at the hospital 24/7. So, it can vary a lot.
I don't think it would be impossible for JS and DS to speak with a doctor that late, but it would be unlikely that they would have a conversation of that type that late at night. Doctors like to discuss a negative prognosis during the day, when clergy and social workers are there so the family has supportive services available.