9 years after the birth of Renesmee and 1 ear after the birth of Nessie's son. Mother and Daughter become pregnant at the same time. Nessie goes though a super pregnancy while for once in every 100 centuries a full growing Vampire Baby is born.
It deals with Renesmee having a one-night affair with Mike a 24 year old and discoving that she now 20 in reality although 17 to others was pregnant. And with the daunting fact that she must tell Jacob all abought it.