There is a detail in the Hebrew of Genesis 16:2 that the Targum will not let pass quietly. Sarah sends her husband to her handmaid Hagar. The Hebrew says simply go in unto my maid. Targum Pseudo-Jonathan inserts a step that changes the ethics of the whole scene.
Sarah says: go to my handmaid and set her free. Only then, perhaps, I may be builded by her.
For the Aramaic paraphrast, a child of promise cannot be born to a slave woman as a slave. Hagar must become a free woman before she becomes the mother of Abraham's son. Otherwise the very first generation of the covenant people begins in bondage, and Sarah will not have it.
And Abraham — the verse ends with a single understated verb — hearkened to the word of Sarah.
The Maggid pauses on that. Sarah is the one who designs this arrangement. Sarah is the one who sets the ethical floor. Sarah is the one Abraham listens to. Pseudo-Jonathan treats her not as a silent matriarch but as the architect of the household, insisting that liberation precedes childbearing (Genesis 16:2). The plan will still go sideways. Hagar will conceive and look at Sarah with new eyes, and grief will follow. But the Targum wants you to know that Sarah began the whole business by trying, at least, to do the right thing first.