Part 1 : Actually Daisy , the dad didn't drown the dad. He was tormented by the constant taunting voice through the baby monitor and was at breaking point. It was only when his wife - who had previously rubbished his claims of the voice in the monitor - heard the voice for herself , calling her a bad mother who didn't deserve her baby , that they decided to go and stay with her mother.
They packed their belongings into their car and as Alison came to have a final plea with them to leave the property , it kept cutting from Alison talking to his wife and reasuring her that they were doing the right thing and the father who had gone into the baby's room and discovered that he had soiled his nappy. When he said to his son "oh you're going to need more than a clean nappy" I knew that he meant a bath and I was on the edge of my seat. Once in the bathroom , the voice continued taunting through the monitor and the father got angry , ripped it out of the wall and ran out into the hall to throw it down the stairs shouting "He's my son. You can't have him". The bathroom door slammed shut and the baby was left alone in the bath. The father began screaming hysterically and started pounding the door shouting "Oh please god no".