If your sister is being harassed and given sexual tortures, she can give a complaint against him with the committee formed by the organisation to protect women from such sexual harassment in the place of employment.
The Sexual Harassment of Women at Workplace (Prevention, Prohibition and Redressal) Act, 2013 is a legislative act in India that seeks to protect women from sexual harassment at their place of work.
The Act came into force from 9 December 2013.
WHEREAS sexual harassment results in violation of the fundamental rights of a woman to equality under articles 14 and 15 of the Constitution of India and her right to life and to live with dignity under article 21 of the Constitution and right to practice any profession or to carry on any occupation, trade or business which includes a right to a safe environment free from sexual harassment;
The Act uses a definition of sexual harassment which was laid down by the Supreme Court of India in Vishaka v. State of Rajasthan (1997). Article 19 (1) g of the Indian Constitution affirms the right of all citizens to be employed in any profession of their choosing or to practice their own trade or business. Vishaka v. State of Rajasthan established that actions resulting in a violation of one's rights to ‘Gender Equality’ and ‘Life and Liberty’ are in fact a violation of the victim’s fundamental right under Article 19 (1) g. The case ruling establishes that sexual harassment violates a woman's rights in the workplace and is thus not just a matter of personal injury.
Your sister may be advised to report the matter in a form of complaint with the higher officials, quoting that if no proper action is taken against the AGM, she will be forced to lodge a complaint against him under the provisions of the above law.