Whilst it held the picture of Shaan (notice it is not Shaantanu) and Natasha, it was more a warning to anyone who entered that room ,specifically to Khanak and even to Shaantanu himself that he was to be Shaan and not himself and Khanak was with 'Shaan' and not SHaantanu and that he was always someone else's world perhaps.
Shaantanu's immediate / prompt removal of the photo was only indicative of how conscious and aware he was of Khanak's presence and her feelings...
We did have the infamous Hetal Baa, come and gift Khanak and Shaantanu the picture of Khanak's late husband and while all watching sighed at the injustice, little did anyone notice that Shaantanu although miffed never mentioned or even suggested or even expressed discomfort with teh picture... neither did Khanak... that moment passed, as soon as the dinner was over and the night passed... the new day brought a new level of comfort , the two of them are so comfortable... and now more so withtheir true selves... they are not Bahu or Natasha's Shaan... they are now...
Khanak and Shaantanu... on their way to be and realize ... SHaantanu's Khanak and Khanak's Shaantanu!
Your thoughts please.
PS - I didnt want this to be lost in the episode thread... since i felt the picture had a significance far more deep than is apparent...