Narada said, Uma assumes the semblance of material form of her OWN WILL,
First She was born in the house of Daksha and there her name was Sati, Her form was charming beyond words, Even in that incarnation she was married to Lord Shiva, and story is known to the world
Sati burnt herself through Yoga in the Yagna of her father to prove her truth on the path of love for her soul-mate-Now reborn in your house-she had undergone terrible penance for the sake of her Lord
Knowing this-give up all doubts, Uma-your daughter is ever beloved of Lord Shiva,
May Lord bless all,
Thanks please