A Twig

When Clem leaves Gabe behind in Richmond to go look for AJ, something happens to him. Something inside Gabe has snapped and it's up to Clementine to repair him before he leaves Richmond for good.
Gabriel starts off as 19 but, will be 20
Clementine starts off 16 but, will be 17
AJ starts off as 5 but, will be 6
Them are the only ages that really matter in this story.