Divorce/ annulment after 2 months of marriage and living separately since marriage.

My uncle was recently married (on May 27,2021) and his wife was in love affair with some other person which we were unaware before marriage. She didn't leave her past behind and was planning to elope with him even after 2 days of marriage. Also she jumped into a well when my uncle informed this situation to her family and questioned her at her place. She was safe, no injuries and staying with her family since then i.e. from May 30,2021. Her illicit act has caused reputational damage to us. We have some recordings from her phone talking to her boyfriend and abusing my uncle. Even they lied about her education too that she finished her intermediate studies. Now, they're spreading rumours that my uncle has tortured her and some other fake alligations too. We want to take annulment or divorce whichever is possible but she isn't accepting that saying that she will live properly hereafter with my uncle. She started saying this after 2 days of that incident which we believe due to family pressures. My uncle tried to convince her for mutual consent divorce but she's denied that too. How shall we proceed further in this situation?