During the Pastoral Conference for the clergy of Rome on 16th June 2016:
“The Pope said that in Argentina’s northeast countryside, couples have a child and live together. They have a civil wedding when the child goes to school, and when they become grandparents they “get married religiously.”
“It’s a superstition, because marriage frightens the husband. It’s a superstition we have to overcome,” the Pope said. “I’ve seen a lot of fidelity in these cohabitations, and I am sure that this is a real marriage, they have the grace of a real marriage because of their fidelity.”
He also noted that as Archbishop of Buenos Aires he had prohibited “shotgun weddings” where the prospective bride was pregnant. He did this on the grounds there was a question of the spouses’ free consent to marry.
“Maybe they love each other, and I’ve seen there are beautiful cases where, after two or three years they got married,” he said. “And I saw them entering the church, father, mother and child in hand. But they knew well (what) they did.”
So the Pope actually made them live in a state of mortal sin whereas they had wanted to get married!
“Some today claim a "right to a trial marriage" where there is an intention of getting married later. However firm the purpose of those who engage in premature sexual relations may be, "the fact is that such liaisons can scarcely ensure mutual sincerity and fidelity in a relationship between a man and a woman, nor, especially, can they protect it from inconstancy of desires or whim." Carnal union is morally legitimate only when a definitive community of life between a man and woman has been established. Human love does not tolerate "trial marriages." It demands a total and definitive gift of persons to one another”. (Catechism of the Catholic Church 2391)
http://www.trumpeteer.co.uk/the-declaration/4594595263