Prayer

My aunt has problem if she wear her upper under garment(bra) for too long, so she removes it. Now someone has told her if she doesnt wear it beneath her cloths her namaz isnt accepted. What is authenticity in this

Assalaamou'alaikoum

Wearing a bra is not a condition of a prayer - a woman is free to either wear a bra or no as long as she is entirely covered except her hand and face.