The babysitter

 The babysitter realized in horror that the man had been in the same house as her the whole time! She raced upstairs and soon discovered the source of the calls: the master bedroom. She cautiously opened the door and there, in the eerie light of the moon, she saw the man holding a knife in one hand and the phone in his other. He lunged at her and with a quivering voice, he whispered “I’ve taken care of the kids...now I’m coming for you.”

The babysitter shrieked and quickly slammed the door shut. She called the police and waited in fear for their arrival. When the police arrived, they searched the house and found the man hidden in a closet in the master bedroom. As it turns out, the man was the children's father, and he had been living in the mansion for months without anyone knowing. Apparently, he had been trying to scare the babysitter so she would leave and he could have his family back.

The man was arrested and taken away, but the babysitter was left shaken by the experience. She continued to take babysitting jobs in the area, hoping to shake off the memories of that terrifying night. Little did she know, however, that those same experiences would eventually lead her to a career as a horror novelist.

Years later, she wrote a book based on her own experience. It became an instant classic, a grim tale of horror and dark comedy in the style of Tales from the Crypt. It was her tales of supernatural events and eerie happenings that kept readers captivated, reminding them that true terror can sometimes be just around the corner.