Worship the Night by Mary Vigliante Szydlowski
ENSLAVED BY DEMONIC PASSION!
Her mother's death freed Lea from a lifetime of repression and frigidity, only to make her the helpless prey of erotic fantasies and nightmare terror. Alone in her mountain cabin retreat, Lea's body and her very soul are subjugated to a phantom from the depths of Hell, who demands that she worship at his evil shrine.
To transform the demon into the flesh-and-blood lover she craves, Lea is forced to commit ever more hideous crimes, until at last she realizes that only the ultimate sacrifice will satisfy her Master's lust!