Is the blood that my mother sees after her menstruation stopped for a year and then returned for one month considered menstruation that prevents her from praying and fasting?

Scholars differed regarding the maximum age at which a woman menstruates. The Hanbalis held that it is fifty years, and any blood a woman sees after this age is not considered menstruation. Many scholars, however, maintained that it is not restricted to the age of fifty; rather, any blood a woman sees during a time when it is possible for it to be menstruation is considered menstruation. Therefore, what your mother sees is considered menstruation. There is no maximum limit for purity (Tuhr), and a woman observes her usual period of menstruation. She is not considered to have reached menopause (Āyisah) until the blood ceases due to old age or change. Accordingly, this blood that your mother sees is considered menstruation, and she must refrain from fasting, prayer, and all other things that a menstruating woman refrains from.