The Boy Who Cried Werewolf/WMG

Jordan isn't a natural werewolf because she had a different mother than Hunter.

This would provide an explanation as to why Hunter is a natural werewolf, but Jordan is not a natural werewolf. Hunter's mother was a carrier of lycanthropic traits, which were passed onto him in active form; in contrast, Jordan's mom was just a normal woman.

Jordan isn't a natural werewolf because she just didn't inherit the werewolf gene

Jordan is a carrier for lycanthropy

Paulina has some item that keeps the sunlight from killing her.

Hence, she is still alive at the end even though she got bathed in sunlight.

Sunlight can still damage her, which is why she was worried about getting in "before the sun comes up."

Paulina has Plot Armor just like Spike and Angel from Buffy the Vampire Slayer.

Some people are just that lucky.