Is it obligatory for the questioner to inform her friend’s family of her return to the creed of Ahl al-Sunnah wa al-Jama’ah after they requested her to do so? And is she sinful for refusing to inform them out of fear of their oppression? And what should she do to establish the creed of Ahl al-Sunnah wa al-Jama’ah in her friend’s mind?

If your friend returns to the creed of Ahl as-Sunnah, you are not obligated to inform her family. If they make you swear an oath and you fear that they will harm her, you are permitted to use allusive and ambiguous language in your oath to avert harm from her, without resorting to outright lies. You should focus on strengthening her belief by seeking knowledge that clarifies the truth and dispels doubts, and by utilizing concise booklets and treatises in this field.