Thereafter, she took the step of divorcing her husband Masanari in order to become a wet nurse to the shogunal family, and in 1604 she was formally appointed as the wet nurse to Takechiyo (the childhood name of Iemitsu), the legitimate son and heir of the second shogun, Hidetada TOKUGAWA.
のちに、将軍家の乳母となるために夫の正成と離婚する形をとり、慶長9年（1604年）に2代将軍徳川秀忠の嫡子・竹千代（家光）の乳母に正式に任命される。