Shrutika has been trying hard for the last 3-4 weeks to break Karan's friendship with Chum, and she has put in considerable effort. She saw this as an opportunity to officially declare her sisterly love and keep Chum under her control with the move of nominating herself. What could have been a better opportunity than this?
For the last 4 weeks, she has been aligning with anyone who could corner Karanveer. She initially joined Avinash's group, but after he confronted her and saw through her game, she couldn’t continue with them. However, she maintained her relationships with Bagga and Vivian, using every opportunity to show her loyalty to them. This is why she constantly undermined Diggy, portraying him in a bad light every now and then while praising Vivian. It’s also why she openly supported Bagga when he mocked Karanveer,and became her Mommy when Karan struck back at Bagga.
She is vile, cunning, and shrewd and never miss a chance to fake her innocence during WKW