Comment by Haru on Solar Eclipse - Chapter 66

Things that could've been done to reduce this mess :
Ellen telling Edwin that he has a twin.
Ellen telling Edwin he wants to kill their Father because he killed his twin.
Ellen telling Edwin that his twin is not dead and needs to find him.
Edwin telling Ellen he likes him and is ready to put the Theodore family and his father down. 
Hector and Edwin working together as always. 
Three of them finding Lai and explaining everything to him. 

In short, 
COMMUNICATION