Does a woman's prayer become invalid if her foot becomes exposed during the prayer?

Question:
May Allah grant you success. Does a woman's prayer become invalid if her foot becomes exposed during the prayer?

Answer:
If it becomes exposed and she leaves it that way, her prayer is invalid because part of her 'awrah (the part of the body that must be covered) has become exposed. However, if something becomes exposed and she did not intend it or did not know about it, then this does not harm her, if Allah wills. Yes.