Help find manhwa

Mc had a child with a dude she thought was a commoner like her but he had a second life as a Noble and married another woman
She confronted him and he wanted to bring her as a second wife
The noble woman he married and the mother of the dude show up and kill the nanny and try to kill mc by pushing her from a cliff into a river
They take the child
Mc awakes 5 years later with powers and she wants revenge and to have her daughter back
Mc starts by saving a noble woman to have backing of this old noble house
But they learn that she was a lost relative of them
Her child is being mistreated by the wife who hides rocks on her food