Three are the Sunan (usages) (that we came to know in case of Bairara). She was given option in regard to her husband when she was emancipated. Sbe was given meat as charity. Messenger of Allah (way peace be upon him) visited me when an earthen pot with meat in it was placed on the fire. He asked for food and be was given bread with ordinary meat (usually cooked in the) house. Thereupon he (Messenger of Allah) said: Don't I see the earthen pot on fire with meat in it? They said: Yes. Messenger of Allah, there is meat in it which was given as charity to Barira. We did not deem it advisable that we should give you that to eat, whereupon he said: It is charity for her, but it is gift for us. Allah's Apostle ﷺ also said: The right of inheritance vests with one who emancipates. (Using translation from Muslim 1504k)   

عَنْ عَائِشَةَ زَوْجِ النَّبِيِّ ﷺ أَنَّهَا قَالَتْ كَانَ فِي بَرِيرَةَ ثَلَاثُ سُنَنٍ خُيِّرَتْ عَلَى زَوْجِهَا حِينَ أُعْتِقَتْ وَأُهْدِيَ لَهَا لَحْمٌ فَدَخَلَ عَلَيَّ رَسُولُ اللهِ ﷺ وَالْبُرْمَةُ عَلَى النَّارِ فَدَعَا بِطَعَامٍ فَأُتِيَ بِخُبْزٍ وَأَدَمٍ مِنْ أَدَمِ الْبَيْتِ فَقَالَ أَلَمْ أَرَ بُرْمَةً عَلَى النَّارِ فِيهَا لَحْمٌ؟ قَالُوا بَلَى يَا رَسُولَ اللهِ ذَلِكَ لَحْمٌ تُصُدِّقَ بِهِ عَلَى بَرِيرَةَ فَكَرِهْنَا أَنْ نُطْعِمَكَ مِنْهُ فَقَالَ هُوَ عَلَيْهَا صَدَقَةٌ وَهُوَ مِنْهَا لَنَا هَدِيَّةٌ وَقَالَ النَّبِيُّ ﷺ فِيهَا إِنَّمَا الْوَلَاءُ لِمَنْ أَعْتَقَ