Concha, born after three boys, was Conchita's particularly cherished daughter. She was the joy of the home. Her father adored her. When at the age of six she fell ill of typhoid, she was only saved by the care and indefatigable devotion of her mother. She became a beautiful young girl but her soul remained entirely for God in inviolable purity. At fifteen she made a vow of virginity. Her personal charm irresistibly attracted to her a whole group of young youths who loved her passionately. For a while she was troubled and told her mother that she no longer wanted to enter the convent. A drama of love took place in her heart.  Her mother respected her freedom but redoubled her prayers and penances: "Lord, if her beauty is an obstacle, take it away from her."

On returning from a retreat, Concha entered the house radiant: "Mama, I have chosen Christ forever."

All intimacy of soul, even more profound, developed between daughter and mother, until Concha's death. Concha became Sister Teresa de Maria lnmaculada. There was correspondence of more than three hundred letters witnessing to this, without counting numerous visits. Their souls vibrated in the communion of one and the same ideal of love of Christ and of sacrifice for the salvation of the world. Conchita's spiritual traits were spontaneously expressed in her daughter's soul. Was not her mother the providential inspirer and foundress of the contemplatives of the Cross?

Her mother never ceased praying for her. "May she be a perfect religious of the Cross!" (Diary, April 17, 1908).

"Grant her perseverance" (Diary, Oct. 5, 1908). When the novitiate left Mexico City for Tlalpan, her mother went with her daughter to the trolley. "l followed her with my eyes, reciting the Magnificat under my breath" (Diary, Aug. 16, 1909).

The visits filled both with great joy. "I saw Sister Teresa so happy" (Diary, May 3, 1908).

And so the years passed. Conchita was proud of her daughter and thanked God. "I am enchanted at Concha's virtue, Concha who is now Sister Teresa de Maria lnmaculada. I blushed with shame on seeing myself now so old and without virtue while she has made such giant steps forward" (Diary, Jan. 17, 1915).

On October 23, 1916, she pronounced her perpetual vows. "It is a day of unforgettable happiness! Teresa de Maria lnmaculada, my daughter Concha, has become forever the Lord's spouse! From the time she first spoke, I had taught her to say that when she grew up she would become 'the Spouse of Christ.'  And here now this union is consummated, this union with the King of heaven and earth."

Sister Teresa made her entrance into the chapel, a lighted candle in her hand, pure, modest, trembling with emotion, radiant with joy.  She pronounced her vows, in a placid and strong voice.  She had a very beautiful voice.  When she sang a solo, the "Vein Spoons Christi," her mother said to her.  "I have felt an inexpressible joy, a profound humiliation and a boundless gratitude" (Diary, Oct. 23, 1916).

Her mother, marveling, contemplated Sister Teresa de Maria lnmaculada. "She is an angel... she will be a great saint" (Diary, Oct. 1916).

The young professed nun was charming.  For her sisters who loved her much, she was a very sympathetic companion, faithful and smiling.  She was very much appreciated by her sisters of Puebla and of Monterrey.  Her life went on without ado.  One moment she went through a grave crisis about vocation but her love for Christ triumphed.  Soon an illness overtook her in the very hot climate of Monterrey.  She spat blood.  There were very hard hours for the mother and the daughter. She was so ill that they transferred her back to Mexico City.

"Mother Javiera requested the archbishop to give me permission to stay near Teresa" (Diary, Dec. 11, 1925). "On the national feast of Our Lady of Guadalupe, December 12, they had her hold a blessed rose, brought from the Basilica, supplicating the Most Holy Virgin that Teresa would be able to receive Viaticum.  She regained the use of her reason and the last sacraments were administered to her.  She was conscious of everything.  I do not know how to thank God.  As for me, the main thing was that she receive Jesus!  How fervently I asked this.  She recognized me and said to me. 'My dear little mama!'  Poor child!  My soul burst, my heart was shattered on seeing her suffer so much!  She repeated to Jesus: 'Behold my body...'  'Behold my blood.'  I looked at her and I wept, offering her to the eternal Father, begging him to take her if that was His will" (Diary, Dec. 12, 1925).

"At two o'clock in the morning, I went by car to get an oxygen balloon.  My God! My God, do not let her die asphyxiated!  She said: 'I do not want to despair.'  And she entered into indescribable anguish, repeating: 'It is for souls, for priests, for the Works of the Cross! My God!'  (Diary, Dec. 17, 1925). 

"Yesterday, December 19, at one forty-five in the afternoon, Teresa died! God of my heart, be a thousand times blessed!

"After twenty-nine days of illness and sharp pain in her whole body, the daughter of my life died...

"She was an angel, a victim, a saint" (Diary, Dec. 20, 1925).