Does a strange child under 12 years old seeing a woman who has performed ablution, with her hair uncovered or dressed in a non-Islamic way, invalidate her ablution?

A man seeing a woman does not invalidate ablution at all, whether the man is an adult or not, or a stranger or not, and whether the woman is in modest clothing or naked, with the Muslim woman’s obligation to adhere to lawful dress in front of non-mahram men.