Why Did Annaymayil Drink Poison?

In episode 91 of Kalathu Veedu, Ponrasu rushes to Panjavarnam to tell her that Annamayil had consumed poison. Panjavarnam explains to an ignorant Ponrasu the real reason behind Annamayil's action. The two then discuss about the fallout of the incident and its impact on their family name!