After being abandoned by her parents while she was still attending the ninja academy in Konohagakure, Moriko moved to a house on the outskirts of the village. She remained in the house for years, never being seen by the villagers, but keeping a magnificent flower garden going in her front yard. The house was labeled the home of a sorceress, and was avoided by regular villagers. All except one.
Naruto found himself entranced by these flowers, and walked by the house every day in an attempt to figure out who lived there.
Seeing Naruto become so fascinated by her existence gave her the courage to venture from her home and request the entry into team 7 - and gave her the opportunity to make up for lost time with her kin.