To what extent is the hadith of Aisha sound regarding a wife plucking her eyebrows for her husband?

Perhaps the questioner is referring to what is stated in Fath al-Bari by Ibn Hajar: that a woman asked Aisha, may Allah be pleased with her: "Should a woman remove hair from her forehead for her husband?" She replied: "Remove from yourself what harms you as much as you can."

If this narration is authentic, it indicates the permissibility for a woman to remove hair from her forehead for her husband, but not the permissibility of nams. The difference between them is that nams specifically refers to plucking eyebrow hair with tweezers, whereas haff is the removal of facial hair with a razor.

We have previously explained that it is permissible for a woman to shave or pluck facial hair, excluding the eyebrows, and that nams is forbidden, even if done for the husband.