Sushila drew her first contemporary painting in 1997. It was of a lesser known Sita. It is believed that Sita, the protagonist from the ancient text Ramayan was born in Mithila, also the birthplace of Mithila painting. Sushila’s Sita was brave and fierce instead of the traditionally depicted devout, loyal wife who stepped into a fire to prove her chastity.
Traditionally, Madhubani art has five distinctive styles — Bharni, Katchni, Tantrik, mandala and kohbar. She choosed Mandala, Kohbar and Katchni art.
In the 1960s Bharni, Kachni and Tantrik style were mainly done by Brahmin and Kayashth women, who are 'upper caste' women in India and Nepal. Their themes were mainly religious and they depicted Gods and Goddesses, flora and fauna in their paintings.
After caste barriers have been broken down, Madhubani painting in its globalized form. Traditionally, the kind of themes that Dalits picked up to paint are now also being adopted by artists from the Brahmin community.
Artists from the Dalit community are also making mainstream Mithila painting.
After marriage She was dedicated to her family and responsibility. After long time her art again called and she started her mission that was left earlier.