My wife gave birth 40 days ago. Since day 37 she ceased to discharge red blood but began discharging lightly colored water. On days 39 and 40, she began to discharge red colored water and on day 41 odorless light red blood.
What is the maximum period for post natal bleeding? Is she to pray and fast during this time?

Post natal bleeding is the blood discharged from a woman's body due to childbirth.
According to some juristic schools, the maximum period for post natal bleeding is 60 days and in most cases it is 40 days. It is impermissible for a woman experiencing post natal bleeding to fast, pray, engage in conjugal relations except after her bleeding ceases.
The ruling
It is impermissible for the inquirer's wife to fast or pray until the bleeding mentioned in the question ceases.
The answer is known from the above and Allah the Almighty knows best.