"Mama Gone" by Jane Yolen from Twelve Impossible Things Before Breakfast

First appeared in Vampires.  Reprinted in The Year’s Best Fantasy and Horror: Fifth Annual Collection, edited by Ellen Datlow & Terri Windling and in Vampires: The Greatest Stories, edited by Martin H. Greenberg.

When Mama died, they didn't chop her up and fill her with garlic as thought to have, her being kin of vampires, but let her be.  So Mama comes back and tries to attack her old home.  The narrator, however, has spread garlic which keeps her away.  That for the night.  But Mama keeps coming and has to find a way to stop, to talk her back into her senses--if such is possible for a dead thing.