Ruling on a woman in post-natal bleeding who becomes pure in less than forty days and then sees blood

Question:
If she becomes pure, O Shaykh, in less than forty days, and then afterwards the blood returns in a small amount?

Answer:
The scholars differed on this, and the correct view is that it is post-natal bleeding. If it returns within the forty days, it is post-natal bleeding until the period is completed; she does not pray or fast.
Q: What about what exceeds the duration?
A: Yes?
Q: What about what exceeds the forty days and coincides with her custom?
A: It is considered her custom.
Q: It is from her custom?
A: It is from the custom of menstruation.