PERMISSION REQUIRED TO FAST VOLUNTARILY H 283 "It is not permissible for a woman to fast voluntarily when her husband is at home, unless he gives her permission. Nor should she permit anyone to enter his house without his permission." R 283 Bukhari and Muslim with a chain up to Abu Hurairah who related that the Prophet, praise and peace be upon him, said this.
282- وعن أَبي هريرة رضي الله عنه أيضاً : أنَّ رَسُول الله صلى الله عليه وآله وسلم ، قَالَ : "لاَ يَحِلُّ لامْرَأةٍ أنْ تَصُومَ وزَوْجُهَا شَاهدٌ إلاَّ بإذْنِهِ ، وَلاَ تَأذَنَ في بَيْتِهِ إلاَّ بِإذنِهِ" مُتَّفَقٌ عَلَيهِ وهذا لفظ البخاري .