The prohibition that results from breastfeeding is related to the issue of the male
وَحَدَّثَنِي أَبُو الرَّبِيعِ الزَّهْرَانِيُّ، حَدَّثَنَا حَمَّادٌ، - يَعْنِي ابْنَ زَيْدٍ - حَدَّثَنَا هِشَامٌ، بِهَذَا الإِسْنَادِ أَنَّ أَخَا أَبِي الْقُعَيْسِ، اسْتَأْذَنَ عَلَيْهَا . فَذَكَرَ نَحْوَهُ .
This hadith has been narrated on the authority of Hisham with the same chain of transmitters (and the words are):" The brother of Abu'l-Qu'ais sought permission from her ('A'isha) (to enter the house). The rest is the same.