A lady sitting on a bench with a book on her lap with a boy and girl on either side of her.
A mother is waiting for the bus with her kids.
A woman sitting on a bench does not imply she is waiting for the bus. A boy and a girl with the woman does not mean they are her kids.
Just because a woman is sitting on a bench with a boy and a girl does not mean that she is a mother, waiting for a bus, or that the children are hers.
A lady, boy, and girl can have a relationship other than being a mother with her kids. Just because they are sitting on a bench, does not imply that they are waiting for the bus.