I don’t think the sister/aunt is a traitor, I think she has her own revenge plans and knew that to make that plan work Jitae cannot get distracted but Jitae had to remind her that the person she is referring to actually have saved her before by not identifying her on the incident - that made the aunt guilty.
Jitae is right Mi-eum has a beautiful soul surrounded by selfish and power-hungry people. And Jitae who desires him and wants revenge is the most selfish of all.
I don’t think the sister/aunt is a traitor, I think she has her own revenge plans and knew that to make that plan work Jitae cannot get distracted but Jitae had to remind her that the person she is referring to actually have saved her before by not identifying her on the incident - that made the aunt guilty.
Jitae is right Mi-eum has a beautiful soul surrounded by selfish and power-hungry people. And Jitae who desires him and wants revenge is the most selfish of all.