Ekta Kapoor shows have this trend where kids grow up and become villains of their parents. For example, Rhea from Kumkum Bhagya wants to separate her parents, Abhi and Pragya.
Even Ruhi from Yeh Hai Mohabbhatein was a villain for a while because she didn’t want Ishita and Raman together.
Pihu from Bade Ache Lagte Hain was a nice and sweet girl and grew up to be a spoilt kid that once separated her parents as well
Non Ekta shows like Saathiya had evil children like Meera, who was determined to ruin Gopi’s life.
Sweet kids in these shows grow up to become evil villains. I reckon Pihu will grow up to hate Preeta and team up with Sona. Sona is here to stay for a long time.