Originally posted by: hypnotoad
YES. THIS. You do see her attraction since the lights off scene.
Yumna's expressions are more subtle than Wahaj but some signature micro-expressions I noticed that Yumna has utilized to show how Merub is clearly affected by Murtasim, is attracted to him, and/or wants him are given below. The examples are illustrative based on what I remember and not exhaustive.
1/ The indrawn breath (equivalent to saansain atak gayee moment)
Examples: Chain scene, Kaan main ghuss jao scene, Keh bhi nahin sakta aur seh bhi nahi sakta scene, gajra scene, ishq scene, etc.
This is Yumna's equivalent of the Wahaj gulp and her most used micro-expression.
You can see Yumna's neck muscles tense and the notch/dip in her neck gets deeper/more visible when she does this. Btw you also see this in her crying scene in the lawn after Murtasim is discharged from the hospital - this is the first time I noticed her neck acting 
2/ The slow blink
Examples: Keh bhi nahin sakta aur seh bhi nahi sakta scene, meri meerub scene, gajra scene, ishq scene
3/ The parted lips (transitioning from pursed to parted lips OR parted to pursed lips)
Examples: Lights off scene, choodiyan scene, ishq scene
She usually goes from parted to pursed lips to signal the transition that she is back to her senses. Also other way around
4/ The coy half-smile
Examples: gajra scene, kheer scene
5/ The gulp
Example: The lawn date (when Murtasim says mohabbat batayee nahin jatee pata chal jatee hai), ishq scene (Murtasim is looking intensely at Merub after her Rumi line, you can see Yuman's neck acting as she centers herself)
6/ Eyes darting towards Murtu's lips
Examples: The lawn date scene
There are probably others but I can't recall now.
P.S. This is an updated versionmoonks of an older post I made.
742