Wife want divorce and now blackmailing for alimony

Got married in 2019, after three months wife gone to her parents home for marriage function and was not willing to come . We didn't understand this because reasons behind this are very light which no one can consider. After our force she came, but she was very ill and her parents took her with them for rest. After that family meetings happened and they said that she is not willing to come and wants divorce. Now after more than one year she is residing there and not willing to come and she wants divorce. We agreed for divorce in mutual conscent, but now they are demanding heavy alimony to us and blackmailing us to file complaint against us and file various charges against us if did not give them alimony. Please help about this.