Ghost Whisperer Episode 3.13 Home But Not Alone

Ned thinks his girlfriend, Lisa, might be haunted by her overprotective dead father, and asks Melinda to help her. Melinda discovers that Lisa, and her sister and brother, are actually being haunted by their overprotective mother, who before she died of cancer, instructed her minor children to not tell anyone about her death. She told them they would be split up as a family by social services if her death was discovered, so they hid it from the town.