Cuevas, at the age of 15, became interested in public service as a result of undertaking scholarly Catholic missionary work in and around Mexico. After getting, by her own free self, a keen eye for what she strongly felt as corruption in and out of rural and urban Mexican towns that she visited doing her school missionary work; Being just 15 years, she decided to start and continue to devote and focus her life on the merely social aspect of such a Catholic missionary work; this, by becoming active in Mexican politics as well as in, as she grew up, in several NGOs.[1]
Since being just a 15-year-old girl from the city, her inner focus and determination to serve others has propelled her to a career as a public servant of the highest standards and commitments, and in 2017, not just within the ins and outs of her country, but by managing to get the election and seal of approval of an unprecedented continental scale.[citation needed]
Cuevas has been an active and politically involved person and PAN member since 1994. She has occupied different positions inside her political party including head of the PAN in Mexico City's Miguel Hidalgo borough.
In April 2005, she and another PAN deputy, Jorge Lara, paid 2,000 MXN in order to prevent Andrés Manuel López Obrador from being jailed as he would "become a martyr" had he gone to jail during his "desafuero".[4]
In 2006 she was elected to serve as Jefe Delegacional of Miguel Hidalgo.
In January 2018, Cuevas Barron left the National Action Party to join the left-wingNational Regeneration Movement (MORENA) citing that the objectives of inclusion, pluralism and development were not met. She will pose as an independent for the rest of her term as a senator, until the inauguration of the LXIV Legislature of the Mexican Congress, where she will represent MORENA. The PAN claimed she left the party since she was not guaranteed a federal deputy spot through the proportional representation process.[6]