Shobhna Jethwa's teenage daughter Bijal, and Mrs Jethwa's two young sons Dillon, 12, and Salesh, 11, arrived home from school to find their mother lying in a pool of blood.
The 15-year-old girl called paramedics to the home but by then it was too late and police launched a murder investigation.
Sources said that Mrs Jethwa, whose husband Rajesh - known as Jeff - was at work at the local railway station at the time, knew her killer.
Mrs Jethwa, who died on Friday, lived with her family in an end-of-terrace three-bedroom house in Luton. Yesterday a bunch of flowers had been left by a tree in the front garden.
On Saturday neighbour Karen Day, 45, said: 'It is awful. The family have lived here for years and years.' Read More