Should a girl be considered a hypocrite for not shaking hands with men and for secluding herself from weddings that include musical instruments, especially given her sister's accusation of hypocrisy and her family's opposition?

A Muslim's fear of hypocrisy for himself is commendable, and the accusation of a sister or family members does no harm if a person worships Allah and avoids strangers and musical instruments. It is advised to remain steadfast in the taqwa of Allah and to diligently recite the prescribed remembrances (adhkar) and supplications (du'as).