KK tweeted the above pic and wrote "Cute new couple in KTLK... adorable!! Mwahhh"
So, the question is why they are brought in? There may be lots of reasons--
1. To show how caring and respectful Nidhi is towards elders/patiants and thus change the POV of DD towards Nidhi and her generation.
2. To make Ashni understand the depth of relationship, marriage, bonding more deeply and thus they will learn that marriage is like old wine, jitna purana hota hae pyar ki gehrai utni hi zyada hota hae and understanding bhi.
3. To reveal some truth/connection of Ashu's past .
These 3, would be reasons, came to my mind . Friends if you guess some more reasons, please share.đ