Who is Wolfgang as noted in the memoir, Easy Beauty?

Wolfgang is Chloé and Andrew's son. Just a few months into Chloé and Andrew's relationship, Chloé is shocked to discover that she is pregnant. This discovery is especially surprising, because for her whole life Chloé has been told that she will not be able to procreate because of her disability. Although she is wary of being inhibited by a child, Chloé decides to go through with the pregnancy. Shortly after Wolfgang's birth, she and Andrew move their new little family to New York City.