The Howling II (novel)

Although content with her new life with her new husband, David Richter, and her young stepson Joey, she is still haunted by the memories of her terrifying ordeal in the California mountain village of Drago with its werewolf inhabitants.

Though the bullet did not kill her as expected, it left a streak of silver through her black hair and rendered her unable to fully transform into a wolf as before.

When Roy and Marcia finally track Karyn down to Mexico, they set a trap for her at a Gypsy wagon with Audrey's unwitting help, and close in for the kill.

Chris eventually manages to kill Roy with a silver-bladed knife, but in the nearby Gypsy wagon, Marcia is holding Karyn hostage and is about to torture her.

As night arrives, Marcia abruptly begins her agonizing change into the half-woman/half-wolf creature, causing her to start a fire and allowing Karyn to escape.