Woman and child
A woman cannot resist a man who tells her that his life is a shambles, and that he needs her, and her alone, to pull his life back together and save him from death. For now she has a child, exactly as if she had her very own baby. A baby needs her for its very life, and it is this need that is love to her. Now she is swept with feelings of importance and power, for a human life is now entirely within her hands. And if it is a man who has given himself, to her, and who she now possesses, then she also feels the power of having the very image of strength crawling at her feet, begging for help.
Man and child are in the same boat, shipwrecked, and washed-up on the shore of woman.