The milk belongs to the husband
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، عَنْ عَائِشَةَ، أَنَّ أَفْلَحَ، أَخَا أَبِي الْقُعَيْسِ جَاءَ يَسْتَأْذِنُ عَلَيْهَا ـ وَهْوَ عَمُّهَا مِنَ الرَّضَاعَةِ ـ بَعْدَ أَنْ نَزَلَ الْحِجَابُ، فَأَبَيْتُ أَنْ آذَنَ لَهُ، فَلَمَّا جَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَخْبَرْتُهُ بِالَّذِي صَنَعْتُ، فَأَمَرَنِي أَنْ آذَنَ لَهُ.
Narrated Aisha: that Aflah the brother of Abu Al-Qu'ais, her foster uncle, came, asking permission to enter upon her after the Verse of Al-Hijab (the use of veils by women) was revealed. `Aisha added: I did not allow him to enter, but when Allah's Messenger (ﷺ) came, I told him what I had done, and he ordered me to give him permission.