Nice idea TTfan...
Before in Thendral, Charu and GW acted nice and planned everything carefully. But now many people know their intentions which changes everything.
Bazari can talk bad about Tulasi all she wants because now no one will listen to her. Also Periamma and Periappa will make sure Charu is away from Tamil and Bazari.
As Charu's pyschoness increases, she will plot to eliminate Tulasi and try to kill her.
Tulasi may get hurt and everyone will reveal to Tamil about Charu's mental acts and they will put her in a mental hospital ending her track. Tamil will also hate his mom even more and make sure him and his wife are never close to her.
This is just one possibility...I hope Kumaran ends her track well.