When Janet was two-years-old she had an imaginary friend named Lucy who did the naughty things – drinking Coca Cola, and eating mummy's make up. This showed that Janet was lonely and, because she had concerned parents, against their gynaecologist's advice they tried to give her a sibling.
When Janet was ten she was secretive, alone, a smothered only child.
When Janet was edging on puberty she gained a brother. She smiled, she teased him, she ruffled his hair - then laughed and hugged him when his magic retaliation when awry.
Cat is her brother, always.
Unfortunately, when he chokes a sob upon waking, she leans over and touches his forehead, his eyes open… and the sob is still there, sometimes he thinks she is his sister.