Found this by chance. Reminded me if Bhavani and Devyani. Such mothers do exist...
Blanche Monnier was an aristocratic woman from Vienne, France. In 1874, at the age of 25, Blanche desired to marry an older lawyer who was not to her mother Louise's liking; she argued that her daughter could not marry a "penniless lawyer". Her disapproving mother, angered by her daughter's defiance, locked her in a tiny, dark room in the attic of their home, where she kept her secluded for 25 years.