Kunti was sad. The jungle life didn't quite go with her. She was a city girl, who loved parties and the adulation of the public. Even the birth of her three children, Yudhishtra, Bhima and Arjuna, had been unable to give her life a meaning. She still often brooded about her eldest son, Karna, the son of the Sun-God, Surya, whom she had thrown into the river for fear of someone finding out about her affair with the God, for pre-marital sex was banned at that time. She knew that there was a very small chance of him still being alive, but she knew somehow (mother's instinct) that he was still alive, and moreover, doing well for himself. And she also knew that his armour and earrings distinguish her eldest son from anyone else on earth, and if she were to ever see him, she would recognize him at once. "And then what would I do?" she often wondered, and she never could come up with the answer.
Meanwhile, the Pandavas were growing up hale and hearty, and Pandu was still making along by masturabating for sex was a strict no-no. To tease him, Madri and Kunti were acting more and more like lesbian partners. Pandu, being pained by Madri's confession that she had not one, but two Gods inside her at the same time (which lead to the birth of Nakul and Sahadeva, the twins) had banned any more sex for both Madri and Kunti, which led them to seek each other. The Pandavas were being taught by the sadhus in the jungle, and their mothers saw to it that they knew that the Hastinapur kingdom was technically theirs for the taking, for their father (foster-father) was the king of Hastinapur, fallen upon bad days. And so the years passed.
Till the day Pandu lost it. Quite literally. It was the twelfth birthday of Arjuna, and the entire family was busy with the birthday celebration. Madri was looking really sexy in her new dress, and Kunti too, as always, but Pandu was really sad. He had been denied sex for so long, and while he had taken to masturbation a lot, it wasn't quite the real thing. The entire family was busy in cutting the cake and feeding the sadhus. The lustful eyes with which the sadhus were lechering at his two wives, made him even sadder. And the body language of Madri and Kunti also showed him that even they didn't mind the passes being made by the sadhus, through their double meaning sentences, (such as "tumhara doodh bahut accha hai", at which Kunti just said, "Aur piyo rishiji, humaare pati to ab hamara doodh pee hee nahin sakte", and they all had laughed, all except Pandu, who felt humiliated). He was being made the cuckold here, and he certainly did not like it. "Keep some standard, women" he wanted to shout out to his two wives, who, as far as he knew, only had sex before with him or gods (leaving aside Kunti with Vidur, of course, but even Vidur was a god incarnate according to Ved Vyasa), and stooping themselves to saadhus' would bring disgrace to the family. But seeing the lust in the brahmins' eyes also turned him pretty horny. He could see what all was he missing - the figures of his two wives had not changed much even after giving births - and he knew at that moment, that he wanted sex. Taking Madri by her waist, he took her into the bedroom and kissed her. Madri was overcome with this show of emotion by Pandu, and while her flesh was willing to go the full distance - it had been 11 long years since she last had sex- she calmed herself, and told Pandu to stop. "Please stop, dear husband - or you will die." Pandu: "But I can't, and this life is not worth living after all. I prefer death to such a life - and what better way to die than in the arms of ones beloved. So come lets fuck." And he starts sucking those wonderful globes. Madri: "But this is wrong hubby. I can't be the reason for you to die. mmm...but it feels so good, keep doing it. Don't stop." And as you can guess now, Madri had sex for the first time after 11 years, while Pandu had after 16 long years. They had soon gotten naked and enjoyed many sexual positions, forgetting all about the curse Pandu was under. It was the best sex anyone had ever enjoyed, and Madri was still moaning "harder, harder" when Pandu's face suddenly went white. He had sweat spots on his face, and he had fallen dead while ejaculating into Madri. Madri let out a huge cry, "Kunti Didi" which made Kunti leave the celebrations and run into the bedroom, to see Madri in bed with her husband who was now dead.
Kunti:"Husband, what has happened? Bitch, what have you done?" (Starts crying).
Madri: "I am sorry, but I just could not stop myself - or him. I am really sorry. Forgive me sister."
Kunti: "Now who will care for us now? What will we do without a husband?"
Madri: "Didi, let us prepare the funeral site. I, being responsible for Pandu's death, will burn along with it. But promise me, Didi, that you will take care of Nakul and Sahadev as your own sons."
Kunti: "Pandu has already left me. Now you want to leave too. But what will I do without you two? I am sorry for calling you a bitch - please don't leave me. Just be here, and we can think of something."
Madri: "Didi, I am sorry, but I cannot bear the guilt of being responsible for his death. So let me go as well. And please promise me."
Kunti: "I promise Madri, but tell me - how did he feel after all these years? You were lucky I must say, for having seen Pandu in his greatest glory after so long."
Madri:"He was great sister, it was so much fun, and after having had experienced it, it is better to die than to live, and so let me burn along with my husband."
And so Madri sits on the funeral pyre along with the body of her deceased husband, and burns alive. This was later mouldedd into the tradition of Sati in India.
Hearing about Pandu's death and Madri's subsequent sati, the entire Hastinapur clan was mournful. Pandu had been apparently a great king, grandson, son, nephew, brother and husband. After the mourning period was over, Bhishma himself went to Kunti in the jungle and told her to come back to the Hastinapur palace along with the five Pandavas, to take their rightful place as princes. So Kunti came back to the Hastinapur palace, to live as a queen, and the five Pandavas, got some new friends - their Kaurava cousins. Pandavas and their mother got a new apartment within the palace walls, and enjoyed the change from the forest life they were used to.
Meanwhile, all the Kauravas were deeply influenced by their big brother, Duryodhana - all except Yuyutsu, the step-brother. Meanwhile, Duryodhana himself was under the spell of his maternal uncle, Shakuni, who had told him all this while, that being the eldest son of the eldest son (Dhritrashtra) Duryodhana deserved to be the new king of Hastinapur after his father. And all of Shakuni's efforts were towards making Duryodhana believe it himself. Duryodhana for his part showed signs of greatness even when he was quite young. The training of the Kauravas started early - when they were just twelve infact - and Duryodhana was easily the best among them. The training was conducted by Kripacharya, the in-house teacher who had also taught Dhritrashtra, Pandu and Vidura. Kripacharya also had a sister, Kripi, who was married to the great teacher, Drona.
So when the Pandavas joined the Kauravas, Bhishma suggested that the Pandavas train too under Kripacharya, and they did. Duryodhana, who never before had any competition to his stature as the best, could not get used to the idea of someone surpassing him, which is what Yudhishtra did in the political sciences department, while Bhima beat him in strength. Moreover, Duryodhana could not quite come to terms with the fact that while earlier he was the adored one, the affections of his parents and grandparents, and even great grandmother Satyavati were divided among the Kauravas and the Pandavas. Only Shakuni, his maternal uncle, loved him as much as before, he thought. And as the others withdrew from him, he grew closer to Shakuni, whose mind was still on defeating Bhishma, and in Duryodhana, he finally had a weapon. And there lay the seed of the discord, which ultimately led to the Mahabharat.