Son of Darkness: To Die for II (1991)

In a small town, Nina, her adopted baby son Tyler and her Danny live in a Bed and Breakfast of their own. Nina's husband left her since Tyler cried all the time driving him crazy. Meanwhile in the town there are several cases of coyote attack with many casualties. When Nina takes Tyler to the hospital, Dr. Max Schreck treats him, and Tyler stops crying. Nina also meets Max's impertinent brother Tom. Soon Max invites Nina to have dinner with him. Meanwhile, Danny meets Cellia and changes his behavior towards Nina. When the stranger Martin visits Nina, he tries to explain that vampires moved to the town, but Nina believes he is lunatic. But soon she learns the truth about Tyler and his family.