By singing one of her Ayah's songs for Colin, Mary again shows that not everything that happened to her in India was bad; she just didn't know how to use any of it. Now that she's feeling more whole and alive, she can pay some of what she learned forward and share it with others, as she does here. This moment also emphasizes how Colin and Mary have both grown up without involved parental figures, instead on hired help. While it’s usually parents who sing to their children at bedtime, here Mary functions as a caregiver of sorts for Colin, singing a song she learned from her own caregiver.