Why Ganga did not prove.................. Review on Gangaa

On &Tv, Ganga is one of my favorite Tv serial. It was really interesting to watch when Ganga and Sagar's love story was in full flow. I never did any mistake to attend the amazing love story show in the serial between Sagar & Ganga. But after Janvi came in between their love-affair and all kind of conspiracy against Ganga by Janvi, Yash and finnally Yash's family- specially Yash's mother, all led into mess and in the long run Yash's mother's revenge to Ganga& Sagar worked and Ganga became pregnant but Sagar did not accepted his child-KRISHNA- all these a few events in this serial- GANGA, made me keep off the serial otherwise I was a regular viewer of this Tv show. My question is- why? Ganga, did not prove that Krishna is Sagar's daughter? DNA test would have told all the truth! But Ganga remained stuck to the old tradition Idea- that Sagar did it but Why is he refusing? Ganga is still not with sagar, She could do it, she could have done it after proving via DNA test, and punish Sagar, thereafter!