Hexed - Teri Hughes - Bog

A young female teacher accepts a live-in job with a woman who wants her to tutor her son. She soon learns that the son is actually dead and the mother is having considerable trouble accepting that fact. She escorts the invisible "ghost" boy in for lessons and expects the teacher to comply with her strange delusion. The teacher plays along..She needs the money... But she soon finds out that the mother isn't a victim of mental illness...there is something more supernatural and sinister at play.