When they arrived they we able to chose what she or he could look like. They decided to make a grandmother. When I finally see her she almost makes me think of a robotic versions of Mary Poppins.
The oldest daughter is very stubborn and doesn't want to except Grandma. Saying that everyone is just make believing, that everyone else wanted her bit she didn't. But she hates Grandma because she says that she is just like her. Also that she can't give love like a human can. But Grandma ends up saving her.
The oldest daughter was finally able to accept her for she wouldn't leave her as her mother did. For the mother died. She ends up staying till the kids finally go off to college.
So in ways this episode shows that it is possible for robots to be able to do good and actually help with family problems. That they can actually give off human emotions and act like normal humans.