I'll rise like the break of Dawn (book 2)

Sequel to The cold never bothered me any way.
It's been six years since Jack left Elsa. He hasn't seen her once. He won't bring winter there or anything. He thinks he won't see her ever again.
Until the moon interferes.
Meanwhile Elsa has moved on. She still misses Jack. But doesn't cry every night any more. Being mother has changed her. But when Jack shows up saying she's needed at North Pole can she drop everything and go or ignore him and go on with her life.