Kindly refer to the following link(s):
Women covering their hair at home and in front of their mahrams and other women
Do Women have to cover head during Adhan, when eating, going to toilet, making wudu, read Quran
Should women cover the hair when at home, reciting Qur'an, dhikr, when going to toilet?
Is a woman required to wear hijab when watching Islamic lectures on TV?