Rajmadan

“Kunti asked Yudhishthira to perform the rituals for Karna as well. When Yudhishthira expressed his surprise, she confessed to the real lineage of Karna. Everyone was shocked at this startling revelation. Yudhishthira could not believe that he had been instrumental in murdering his own brother for the throne of Hastinapura. He fell into a deep swoon and after coming out of it he refused to be the King of Hastinapura and prepared to leave for the forest. It required lot of effort for days together on the part of Maharishi Vyasa, Narada and Shri Krishna to finally persuade him to desist from doing so. But in sheer agony, Yudhishthira cursed all women that thenceforth they would not be able to keep any secret for long.”
― Umesh Kotru, Karna The Unsung Hero of the Mahabharata