A jealous boyfriend killed three generations of the same family after torching their home on the day his baby came home from hospital, a murder trial at Newport Crown Court has heard.
Carl Mills, 29, is accused of killing his own baby daughter, her mother and grandmother after setting their home ablaze.
Kayleigh Buckley, 17, six-month-old daughter Kimberley and grandmother Kim, 46. were all trapped in their home when it was engulfed in flame.
A court heard how Mills started the deadly inferno after he became convinced Kayleigh had another man in her bedroom.But the only people inside were the family - who were celebrating Kimberley's homecoming after being born prematurely at just 1lb 9ozs in hospital.
Prosecutor Greg Bull said the three victims didn't have a chance, "Within minutes it became impossible to save the people inside. Neighbour did all the rights things but they were confronted with a scene which can only be described as heartbreaking."
Newport Crown Court heard how Kayleigh met Mills when she was just 15 on the internet - he was living in Manchester and travelled to her home in Cwmbran, South Wales.
Mills, of no fixed abode, denies three charges of murder. The trial continues.