In Krishna lila, Sita Thakurani is Yogamaya or also Paurnamasi. At Krishna's birth ceremony she gave many instructions about child care to Nanda and Yashoda. Similarly, in Gaura lila Sita Thakurani would often help Sachimata nurture baby Nimai. Sita Thakurani and Sachi Mata were of one mind; their life and soul was Nimai. Because of Sita Thakurani's pure parental love, Sachi Mata often chose her as the first person to worship Nimai Pandit during any auspicious ceremony.
Later Shri Chaitanya Mahaprabhu and Shri Nityananda Prabhu often came to Shantipur to visit Advaita Acharya and Sita Thakurani. They would collect all the neighbors and hold an uproarious festival of Krishna nama-lila kirtana extending late into the night. When Lord Chaitanya moved to Jagannatha Puri Advaita Prabhu and Sita Thakurani would regularly visit Him.
Sita Thakurani would cook Mahaprabhu's favorite foods and offer lunch to the Lord. Sita Thakurani loved Lord Chaitanya as a son and He loved her as His mother.