She thinks that she has passed wind – does that break her wudu?

A person should not stop praying unless he is certain that something has come out of him, He should not pay attention to these whispers because they come from the Shaytaan. Hence al-Bukhari (may Allah have mercy on him) gave one chapter (of his Saheeh) the title, “One should not do wudu based on doubt until one is certain,” in which is narrated the hadeeth of ‘Abbaad ibn Tameem from his paternal uncle, that a man complained to the Messenger of Allah (peace and blessings of Allah be upon him) that he imagined that he felt something whilst praying. He said: “Do not stop (praying) unless you hear a sound or notice a smell.” (al-wudu, 134). None of these whispers and thoughts break one’s wudu. 

But if a person is certain that something has come out of him, then in this case his wudu is broken. If a person is faced with such whispers, he has to ignore them and assume that he is taahir (pure), because if he thinks too much about this matter, the whispers will persist. 

With regard to wind emitted from a woman’s vagina, this does not break wudu. The Standing Committee was asked about wind being passed from a woman’s vagina during prayer. They replied that this does not break wudu because it does not come from an impure site, unlike wind that comes from the anus.