Sita Thakurani gives the transcendental child the name Nimai
Srimati Sita Thakurani was Advaita Acharya's wife, worshipable by all the three worlds. She was the daughter of Sri Narishinga Baduri. After their wedding, Advaita Acharya went to Nadiya, to live in Shantipura. Sita Thakurani was always absorbed in vatsalya prema for Sri Gaurasundara, and out of parental concern used to instruct Jagannatha Mishra on how to care for the boy.
Sri Sita Thakurani is Yogamaya according to Gaura-Ganoddesha-Dipika. The Gaura-Parshada-Charitvali says that in Krishna lila, she was Purnamasi, the mother of Sandipani Muni, grandmother of Madhumangal and Nandimukhi and a disciple of Narada Muni. The Chaitanya-charitamrita gives the following account of Sita Thakurani's visit to the house of Jagannatha Mishra after the birth of the Lord:
"One day, shortly after Sri Chaitanya Mahaprabhu was born, Advaita Acharya's wife, Sita devi, taking permission of her husband, went to see the child with all kinds of gifts and presents including gold and silver coins. Riding in a palanquin and accompanied by maidservants, Sita Thakurani came to the house of Jagannatha Mishra, bringing with her many auspicious articles such as fresh grass, paddy, gorochana, turmeric, kunkuma, and sandalwood. When Sita Thakurani came to the house of Sachidevi, she was astonished to see the newly born child, for she appreciated that except for a difference in color, the child was directly Krishna of Gokula Himself.
Seeing the transcendental bodily effulgence of the child, each of His nicely constructed limbs full of auspicious signs and resembling a form of gold, Sita Thakurani was very much pleased, and because of her maternal affection, she felt as if her heart were melting. She blessed the newly born child by placing fresh grass and paddy on His head and saying, "May You be blessed with a long duration of life." But being afraid of ghosts and witches, she gave the child the name Nimai. Then Sita Thakurani, being honored by mother Sachidevi and Jagannatha Mishra, was greatly happy within her mind, and thus she returned home."
Sita Thakurani would often come to Mayapur from Shantipura, in order to teach Sachimata how to care for the baby. After Sri Gaurasundara's appearance, all the devotees prayed together with Sri Advaita Acharya and Sita Thakurani that the child might live long in Mayapur and have good fortune.
Sita Thakurani and Sachidevi were of one mind; the baby Nimai was their life and soul.
When Jagannatha Mishra's son Vishvarupa – Nimai's older brother – had grown up, he suddenly took sannyasa. The grief and agony of Jagannatha Mishra and Sachidevi upon their son's leaving was great. At that time Advaita Acharya and Sita Thakurani consoled Jagannatha Mishra and Sachidevi, and helped take care of Nimai.
After exhibiting His childhood pastimes, Nimai gradually progressed into His Kishora-lila, or pastimes of youth. After some time, He went to Gaya and revealed His true form and real purpose. As time went by He took sannyasa and turned His face towards Vrindavana, and ran off, half mad into the jungle in search of Sri Krishna. Upon hearing this, Sri Sita Thakurani spent four days with Sachidevi, who, plunged in the darkness of separation as if the sun had left the sky forever, lay fallen on the ground like one near death.
Sri Chaitanya Mahaprabhu, being bound by the ropes of love, was unable to go to Vrindavana, but was drawn to return to Shantipura. When He arrived in Shantipura, Advaita Acharya and Sita Thakurani felt as if their life had returned. After having fasted for four days, Sri Gaurasundara accepted prasada cooked by the hands of Sita Thakurani.
Previous to taking sannyasa also, Sri Chaitanya Mahaprabhu along with Nityananda Prabhu would, from time to time go to the house of Advaita in Shantipura, where they would have a festival and perform Krishna-nama-lila-kirtan all day and night.
After Sri Chaitanya Mahaprabhu took sannyasa and went to live in Jagannatha Puri, Sri Advaita Acharya and Sita Thakurani used to go and visit Him each year, bringing their son Achyutananda with them. On one such occasion, Sita Thakurani prepared some of the Lord's favorite preparations and invited Him to their home to take lunch. Simply to increase their ecstasy, the Lord, who was always absorbed in Krishna Nama, honored their invitation and took lunch in the home of Advaita and Sita.
Sita Thakurani, being always overwhelmed with vatsalya-prema treated Him as affectionately as if He were her own son. The Lord Himself also treated her with the same kind of regard and affection that He had for Sachidevi herself. Sri Sita Thakurani bore three sons, Achyutananda, Krishna Mishra and Gopala Mishra, who were followers of Sri Chaitanya Mahaprabhu.