Restless Sex (1920) (1920)

Marion Davies plays Stephanie a vivacious young woman who wants to experience everything. Adopted into the Cleland family as a child Stephanie has long be smitten with her adoptive brother Jim, but he has remained committed to that idea that Stephanie is his kid sister. However when their lives diverge and they are separated by an ocean Jim suddenly considers that Stephanie indeed is not really his sister just as he realizes how very special she is to him.