My mom started to wear hijab after I spoke to her. She wasn't wearing since marriage.
My mom spoke to her 5 sisters and they too followed suit.
Will I be rewarded for my aunt's wearing of hijab without reduction in their reward?
Abu Mas’ud reported: The Prophet, peace and blessings be upon him, said, “Whoever guides someone to goodness will have a reward like one who did it.” Source: Ṣaḥīḥ Muslim 1893