question about PC in Krissh 3

Ok, this question popped up in my head while watching the trailor of Krissh 3..From the little footage we get to see of PC, she is playing Hrithik's love interest in the film! But has'nt she already played Hrithik's love interest in Krissh 2? so actually, she should be playing Hrithik's mother in this movie, if I am not mistaken! 😕 Its seems kind of confusing to me..does any one know if this is a continuation of the part 2 or is it a whole new story altogether???

😆
Preitt zinta was the love interest of the father hrithik in KMG
she was killed of in the begiing of Krish
PC was the love interest of HR the son in Krish
now K3 is about the same son in Krish
So PC is the love interest of the son
There are only 2 HR , first of KMG
second of krrish
krrish 3 has them both