From n.4 of the relatio, which introduces the part in which the Synod Fathers discuss the situation of the family in the world of today (Bishop Campbell's translation, with some adjustments, added emphasis mine):
.... The family founded on the marriage of a man and woman is the splendid and irreplaceable place of the personal love which transmits life. Love is not reduced to an illusion of the moment, love is not an end in itself, love seeks the trustworthiness of a personal “you”. In the mutual promise of love, in good times and in bad, love desires continuity of life, right until death. The fundamental desire to form networks of love, sound and inter-generational within the family presents itself in a constant and significant way, over and above cultural and religious limits and social changes. In the liberty of the free “yes” exchanged life-long between a man and a woman, the love of God is both present and experienced. For the Catholic faith marriage is a sacred sign in which the love of God for his Church becomes effective. The Christian family is consequently a lived part of the Church: a “domestic Church”.
The couple and life in marriage are not abstract realities, they remain imperfect and vulnerable. For this reason the will to conversion is ever necessary, to forgive and to begin again. In our responsibility as Pastors, we are concerned for the life of families. We wish to listen to the reality of their life and their challenges, and to accompany them with the look of love which comes from the Gospel....Can you notice the clear assertion of marriage as being between a man and a woman; and that this marriage is the foundation for the family? And that it is asserted as a life-long "yes", even until death?
And this introducing the part of the relatio that looks at the situation of the family today.