I agree Debby that Shaurya is definitely a spawn of two bad genes.
Shakshi and Rajnath fit the bill nicely.
Shakshi without a second thought killed Rehmat and his son Akram and left and never looked back.
If she had been pregnant with the man she killed she in her ambition to climb to money heights she would have aborted the child.
So if you want to say that Shaurya is not her and Rajnath's biological son, then the only thing that would make sense is that Shaurya is the son of the man she had loved before meeting Rajnath who was either a Don or an Evil man she chose to leave and give her son a better name and status in life.
But Shaurya is Shakshi's son and that she has proven by overlooking his evil and rotten behaviour all his life.
Shakshi would not love anyone or anything as much as she does Shaurya. He is her greatest weakness.
And that she feels this special bond with him is only due to the fact that she physically
carried him for 9 months and gave birth to him.
So yes ,Shaurya is a Goenka with all the soiled blood lineage from his Evil mother and his money hungry father Rajnath .