Who is Sally Athelny from Of Human Bondage and what is their importance?

Sally Athelny is the oldest daughter of Thorne Athelny. Sally is a quiet girl who seems more mature than her age. Sally takes care of her siblings and helps her mother out around the house as much as she can. When she is old enough, Sally goes to work in a dress shop to help with the family finances. Sally falls in love with Philip when she sees him after he becomes destitute. Sally will not entertain the attentions of any of the many boys who pursue her because her heart is set on Philip. When they are alone together during a vacation, Philip kisses Sally and finds her very passionate. They make love and Philip soon learns the depth of her affections. When Philip later learns Sally might be pregnant, he makes up his mind to marry her. Despite the news that the pregnancy was a false alarm, Philip still insists on marrying her. Philip is not in love, but Sally loves him and he feels a deep affection for her. Philip feels this is enough.