Can a woman mourn for anyone other than her husband?
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ هِشَامِ بْنِ حَسَّانَ، عَنْ حَفْصَةَ، عَنْ أُمِّ عَطِيَّةَ، قَالَتْ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " لاَ تُحِدُّ عَلَى مَيِّتٍ فَوْقَ ثَلاَثٍ إِلاَّ الْمَرْأَةُ تُحِدُّ عَلَى زَوْجِهَا أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا وَلاَ تَلْبَسُ ثَوْبًا مَصْبُوغًا إِلاَّ ثَوْبَ عَصْبٍ وَلاَ تَكْتَحِلُ وَلاَ تَطَيَّبُ إِلاَّ عِنْدَ أَدْنَى طُهْرِهَا بِنُبْذَةٍ مِنْ قُسْطٍ وَأَظْفَارٍ " .
It was narrated from Umm 'Atiyyah that the Messenger of Allah (ﷺ) said: 'No deceased person should be mourned for more than three days, except a woman should mourn for her husband for four months and ten days, and she should not wear dyed clothes, except for a garment of 'Asb, and she should not wear kohl or perfume, except at the beginning of her purity, when she may apply a little Qust and Azfar.’”