What is the ruling on a mother retaining her pension if her daughter is Christian and married a Muslim, and the marriage has not yet been publicly declared?

Congratulations on the blessing of Islam and guidance. We pray for your steadfastness, assistance, success, and the guidance of your family. Regarding the pension, it follows the system in effect in the country. If your marriage or your conversion to Islam would cut off your mother's pension, then inform her of this and advise her to notify the competent authority. It is recommended to be diligent in reading the Quran, learning the rulings of Islam, performing prayers, and showing kindness to family, relatives, and neighbors.