In plain words
If Hanumān sets his mind to it, he can accomplish any mighty deed, however great. As he listened to all that Sītā said, he was filled with joy. ‘Mother Sītā is a woman of great virtue. In virtue no one else can equal her,’ he thought to himself.
Without further delay Sītā ran to the battlefield. Counselling her sons to give up the battle, fall at Śrī Rāma's feet and seek refuge, she spoke thus: “Dear children! This is not good for you. To fight one's father is a great sin. Instead of worshipping your father, praying to him and becoming worthy of his love, to fight him and wish to defeat him is sheer folly. Whatever state you may be in, a father remains a father for ever. As it is said, ‘Revere your mother as God, your father as God, your teacher as God’: you must regard mother and father as God before your eyes, and worship them. You must obey your father's command. But you must not harbour hatred against him. You pride yourselves that you have gained great mastery in archery and can conquer anyone. This is nothing but the arrogance that comes of ignorance. Śrī Rāma is the Paramātma in person. If you ignore my words and are ready for battle, I will no longer remain on this earth. It will shame me deeply even to say that you are my sons.”
Learning that Śrī Rāmacandra himself was their father, Lava and Kuśa repented of what they had done. While Rāma was still a good way off, they ran to him, fell at his feet and begged forgiveness. Knowing that Lava and Kuśa were his own sons, Rāma was overjoyed.
In this way the great sage Vālmīki wrote in the Rāmāyaṇa just what happened, as it happened. The poets of those days did not make things up. They spoke only the truth. In their writings they gave no room to even the smallest untruth. The whole Rāmāyaṇa rests on Satya and Dharma alone.