Why does Woolf have Judith Shakespeare become pregnant?

We aren't apprised of the author's intent, but from the tect and its focus on the role of women in Elizabethan England, we can infer that pregnancy is a natural result of Judith's lifestyle. When Judith runs away and takes up with a man in a sexual relationship, pregnancy is a natural and expected result. The shame attached to pregnancy out of wedlock, also often resulted in suicide. In this way, the role of women is portrayed and illustrated.