Saoirse leans back so Greta can see the size of her smile, the depth of her gratitude. Greta is a great mum; she hopes she stays in Darrow with her forever, even though she's sure she must miss home sometimes, and even though she herself misses Dad and Ben. It's easier, with Cu here, and she does still miss them. But having Greta makes it feel smaller, and Jordan is much nicer to her than Ben is.