Before bedtime, I got Calder to hang the laundry. When he had finished, he went as usual to the washing machine to check that he had not missed out any clothes. Upon leaving the kitchen, he turned off all its lights, not realising that Ethel was brushing her teeth in the kitchen toilet.
Calder quietly turned the lights back on. When I met him in the Iiving room, I decided that he needed to learn to apologise in situations like this.
Me: Calder, tell Mei Mei "sorry".
Obediently, Calder turned back to find his sister.
And he said to her:
Tell Mei Mei sorry.