Karthik Slaps Kasi, Exposes Jyothsna's Cunning in Karthika Deepam

• Deepa records Jyothsna's conversation as instructed by Karthik, but Jyothsna pretends ignorance about Vaira.
• Karthik suspects Jyothsna's cleverness, believing she feigned unawareness after realizing the recording.
• Karthik confronts Kasi, slaps him, and forces him to go to Vaira, suspecting Jyothsna sent Kasi.
• Karthik vows to fulfill his promise to his mother and get his father out.
• Dasaratha expresses sorrow over Sumitra, finding comfort and a resemblance to his own daughter in Deepa.

Why It Matters: Karthik uncovers Jyothsna's deceit and pushes Kasi for truth, while Deepa comforts Dasaratha.