Written update of Kasautii Zindagi Kay August 13, 2019: Mr. Bajaj gets mad at Prerna for putting Cookie in trouble

The episode of Kasautii Zindagii Kay He begins with Anurag attending the meeting after Anupam asks him to earn more money to make Prerna regret his decision to marry Mr. Bajaj and not him. Mr. Bajaj returns home and asks for Cookie. Mr. Bajaj's aunt and Tanvi inform him that she was playing with Prerna.

Bajaj asks Prerna about Cookie and Mohini and Nivedita says that Preerna is not a responsible person. Mr. Bajaj gets mad at Prerna for not taking proper care of Cookie. Nivedita listens to him telling Prerna that he married her just to take care of Cookie and nothing else and she wonders what Mr. Bajaj was referring to. Tanvi finds Cookie in the warehouse completely unconscious. She panics and calls Mr. Bajaj and Prerna. Everyone runs to the store and sees Cookie. Mr. Bajaj's aunt calls the doctor and informs him that it was because of Prerna's carelessness that Cookie became ill.

The subsequent flashback shows how Tanvi and Mr. Bajaj's aunt had planned everything to catch Prerna. Mr. Bajaj's aunt says he wanted Tanvi to marry him and Prerna ruined his plan. She says there was still hope since Mr. Bajaj had never had feelings for Prerna.

Mr. Bajaj feels relieved when Cookie wakes up and is better. Cookie joins Prerna and they begin to hug and talk. She tells Prerna that the warehouse door closed and the lights went out. Mr. Bajaj gets mad at Prerna and his aunt asks him not to treat Prerna as a random person, since she is his obedient wife. Mr. Bajaj is happy when he sees Cookie happy with Prerna. Prerna feels responsible for Cookie's scary incident.