Question:

A woman performed wudhu for salah, thereafter her child started to cry, so she suckled the child. She performed the two sunnah rakaat of Fajr, then she suckled the child, thereafter she performed the Fardh. Will the salah be valid?

Answer: حامدا ومصليا ومسلما

Suckling of a child does not nullify wudhu. In the above scenario, there is no need to doubt the validity of the salah of a woman who simply suckled a child and performed salah without renewing her wudhu. The exiting of a clean substance from other than the two passages (front and back) does not nullify the wudhu. The suckling of a woman also comes under this (ruling).

والشيء الطاهر اذا خرج من السبيلين انتقض الوضوء كالريح بخلاف غير السبيلين كالدمع والعرق. (السعاية 1/151)

And Allah knows best.
Hazrat Mufti Ahmad Khanpuri Saheb (May Allah preserve him)
Mahmoodul Fataawaa 1/382-383