A Mother's Perseverance

Kadru requests Rishi Kashyap not to say such things to the Naag brothers and also, they are your son too, don't leave them helpless. On the other hand, she says, while performing Savitri satyawan pravahar can bring back from Yamraj then I'm also having the same power of purity, and perseverance, I will also save lives of my sons. What will Kadru do to save her Naag sons?