Divina said Hayley and Hope are the last of the "Labonair" blood line , they are the last of the Hollow's weakness because Labonair are the direct descendant of Hollow's mother . But the rest of the Crescent wolves are also direct descendant of Hollow's mother as well.

Maybe the Labonair family are descended the the oldest surviving child of Hollow's mother . Jason's family is also another royal bloodline of the Pack , Jason's family were another main branch of the bloodline .

But the rest of the Crescent clan are also Hollow's relative , their blood could also Harm the Hollow , The Hollow could also target the Crescent pack after she kill Hayley and Hope .