Estévez was appointed advisor of the Executive Board of the Córdoba Women's Provincial Council in 2008, a position she held until 2010. From then, she was regional chief of the provincial branch of ANSES, from 2012 to 2015.[2] She is a member of La Cámpora.[3]
Estévez ran for a seat in the Argentine Chamber of Deputies in the 2015 general election; she was the first candidate in the Front for Victory list in Córdoba Province, ahead of Juan Manuel Pereyra.[4] The Front for Victory list received 18.10% of the votes, and both Estévez and Pereyra were elected.[5] She was sworn in on 10 December 2015.[6]
As a national deputy, Estévez was a vocal supporter of the legalization of abortion in Argentina. She voted in favor of the two Voluntary Interruption of Pregnancy bills that were debated by the Argentine Congress in 2018 and 2020.[7] She has also been a supporter of the expansion of LGBT rights, having authored and introduced the 2021 bill on travesti and trans labour quota, which was approved by Congress.[8]