I say, and with God's success: Her menstruation lasts for five continuous days; because it is valid blood, and her purity lasts for the rest of the month; as what she saw was invalid purity and does not make her a habitual menstruator. Thus, it is not suitable for establishing the habitual days of menstruation. See: Manhal Al-Waridin, pages 39-40, and others. And God knows best.