What is the strong evidence that can be presented to invalidate the fatwa permitting a female employee to breastfeed her male colleague in the office, which is based on hadiths from Sahih Al-Bukhari and Muslim to avoid unlawful seclusion (khalwa), and what are the conditions for this fatwa if it is permissible, and what are the conditions for its invalidation?

One should not seek out the anomalous or erroneous statements of scholars. The Islamic Research Academy and the scholars of Al-Azhar have denounced the fatwa in question, and its proponent has retracted it. The majority of scholars hold that the nursing of an adult does not establish a prohibitory relationship (mahramiyya), and that the hadith of Sahla bint Suhail is a special dispensation. Furthermore, it is not permissible for a woman to work if it involves seclusion (khalwa) or unlawful mixing (ikhtilat) with men.