Why did Lord Krishna never meet Yashoda again?

Why did Lord Krishna never meet Yashoda again? Lord Krishna even after he went to Mathura did meet Yashoda and Nanda on 3 seperate occassions. After defeating Hansa and Dimbhaka, Lord Krishna rested at Govardhana mountain. Hearing this Nanda, Yashoda and the Gopas came to visit him - (O Janamejaya!) Hearing that Vasudeva (Krishna) has arrived at govardhana along with his elder brother (balarama), Yashoda and Nandagopa, eagerly longing to see Krishna took fresh butter, thick sour milk, food made with rice and sugar, a dish made of sesamum and grain and wild flowers, O great king, (Janamejaya! Vaishampayana continued) and also bracelets made of peacock feathers, accompanied by cowherds and cowherd-women, O king (Janamejaya! Vaishampayana continued), highly pleased, immediately went to govardhana. They saw Krishna, Vasudeva, having great arms, having eyes as wide as the deer's eyes, along with his elder brother (Balarama) sitting below a tree, leaning on it. Seeing Krishna and Balarama, they became highly pleased. The powerful Krishna and Balarama bowed to them. Then they offered the food made with rice and sugar and other items to the devas. (Krishna said) O father! O mother! Are your wealth of cattle at vraja well or not? O father! Are the cows giving you good milk or not? Are the calves and the bulls well or not? Is the milk good or not? Are the cows auspicious or not? Are the calves drinking their mother's milk or not? Are you not keeping lots of ropes and posts? O father! Is there good grass available in plenty? Are there carts with fragrance? Have the cowherd women given birth to children? O mother! Are there lots of pots in vraja which are unbroken? O father! Are the cows giving you plenty of milk? Are you not getting good milk, butter and sour milk? Are all the cattle wealth without any disease? Nanda said: O the best among Yadavas (Krishna)! All the cattle wealth are without any disease, O lord! O keshava (Krishna)! All the cattle wealth are well. O the Lord of gods (Krishna)! Because of your protection, we are always well. O keshava (Krishna)! The cattle wealth along with the calves are without any disease. We always have only one sorrow: O keshava (Krishna)! We are unable to see you. This only one sorrow is always breaking our minds. Vaishampayana said: (O janamejaya!) keshava (Krishna) said to nanda who was lamenting thus: Do not lament. Go home. Then he told yashoda: “Mother! Go home. All those who recite your names shall go to heaven. Those bowing to you will always be most dear to me. Hari (Krishna) continued: They will always be my devotees. Go home.” The eternal lord Vasudeva (Krishna) told thus to the parents. Embracing the parents tightly, keshava (Krishna) made them happy and then bid farewell to them. Afterwards, nandagopa and yashoda went home.