At the end of episode 1 the TV series Humans, we see the synth (robot) Anita carries a sleeping Sophie out in the rain at night. In episode 2, Sophie's mother, Laura, asks Sophie why her pyjamas are wet, and Sophie insists that it's not her fault. Laura later notices that Anita's shoes were wet, and when asked why, Anita says she went out for a walk.
What was the point of taking Sophie with her?