I agree with Vishal that Shehnaz is very smart and I feel the smartest one there.
1. The way she finds a reason for a convenient flip
2. Uses those times to cozy up to other HMs she otherwise wouldnt have been able to spend time with
3. The way she changes her personality based on convenience e.g WKV
3. Is able to play Shukla like a puppeteer.
Its the last one that is most striking. I wonder whether he has started realizing that she is making him look like a lusty old man who a girl can make lose his head over and then make up with by going to bed with him.