Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 years ago

If she is praying at home or anywhere, where there is No non-Mahram seeing her, or able to see her, then she does not need to cover anything below the ankles, but if she is praying where there is a possibility of non Mahram to see her, then it becomes compulsory on her to cover her ankles and and the whole foot.

We have got many authentic Hadeeths in this regard. ( Mustamsak al-‘Orwah al-Wothqa and Jawahiri al-Kalamazoo and other books).