The ruling on the fasting of a menstruating woman if the bleeding continues after the usual period

The questioner:
The question of our esteemed listeners continues regarding what concerns menstruation, post-natal bleeding, and pregnancy, and the rulings that follow from them. So we ask the Honorable Shaykh, to begin with: If the blood continues with a woman after the days of her usual custom, does she fast, or what does she do?

The Shaykh:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, and upon his family and all his Companions. As for what follows, a menstruating woman does not perform the full ritual bath, nor does she fast, until the blood stops from her completely, such that she sees nothing. This is by the emergence of the white discharge, which is a sign of purity that women know, or by her finding complete dryness, such that if she places a cotton pad at the exit and looks at it, she sees nothing on it. At that point, she performs the full ritual bath, fasts, and prays, and her menstruation ends. As for as long as the blood has not stopped, she remains a menstruating woman, even if it exceeds the usual custom, because the custom may increase and may decrease, it may come earlier and may be delayed up to fifteen days. The custom may increase up to fifteen days. So as long as the blood is present and continuous, she does not perform the full ritual bath, but rather she waits until it stops.
If it exceeds fifteen days and does not stop, she performs the full ritual bath at fifteen days, and she fasts and prays, and she considers what remains after fifteen days to be bleeding, which is called irregular non-menstrual bleeding. Yes.

The questioner:
And if, Shaykh, her custom does not exceed seven or six days?

The Shaykh:
It increases. As long as the blood is continuous and has not stopped at the completion of the custom, perhaps the custom has increased. Yes.