Together they have eight children: Ruben T. dela vega, Enrique, Cynthia, Jose Alberto, Manuel Luis, Maria Luisa, Lourdes Rosario, Francisco Antonio and Ana Consuelo.
Her first experience in singing in front of a big crowd was during her elementary graduation where she sang "O Sole Mio", which was taught to her by her father.
During the Japanese occupation in the Philippines, Rosita got her first break with the help of Lou Salvador Sr. who hired her to sing the intermission numbers from the Cine Strand.
After the war, she made rounds of camps to entertain the wounded American soldiers along with other singers that were invited by the United States Service Organization.
She was chosen by Raul Manglapus to sing the campaign song of Ramon Magsaysay, claiming that her voice could swing the vote for the candidate, who was known as the man of the masses.
This time, her focus was on the Catholic Church where she became a lay leader, volunteer an avid cursilista and a member of the charismatic group of Sta.