It is not allowable for a woman to keep (voluntary) fast when her husband is present without his permission, and she may not allow anyone to enter his house without his permission.

A woman came to the Prophet (ﷺ) while we were with him.

She said: Messenger of Allah, my husband, Safwan ibn al-Mu'attal, beats me when I pray, and makes me break my fast when I keep a fast, and he does not offer the dawn prayer until the sun rises.

He asked Safwan, who was present, about what she had said. He replied: Messenger of Allah, as for her statement "he beats me when I pray", she recites two surahs (during prayer) and I have prohibited her (to do so).

He (the Prophet) said: If one surah is recited (during prayer), that is sufficient for the people.

(Safwan continued:) As regards her saying "he makes me break my fast," she dotes on fasting; I am a young man, I cannot restrain myself.

The Messenger of Allah (ﷺ) said on that day: A woman should not fast except with the permission of her husband.

(Safwan said:) As for her statement that I do not pray until the sun rises, we are a people belonging to a class, and that (our profession of supplying water) is already known about us. We do not awake until the sun rises. He said: When you awake, offer your prayer.