She Brought Her Sister Home - Episode 4

Natalia appears during a tense family scene when the mother demands the whereabouts of the real daughter who got switched. She's sent to the side hall, meets the girl and notes she looks exactly like young grandma. Natalia admits she doesn't hate having a sister but can't stand Molly's bad temper, then tells the child, "I'm Natalia, your older sister." When the child is revealed to have been hurt by a drunken foster father, Natalia vows to protect her and declares herself leader of the household, leaving the family stunned and the outcome unsettled.