Accompanied by his wife Peggy and son Alan, Brian Aim read out a victim impact statement talking of the family's loss.
"I would have been so proud to have taken Karen down the aisle in her wedding dress, instead I took Karen down the aisle in a coffin," he said.
"Jahche denied her the possibility of becoming a mother or a granny."
Ms Aim was found critically injured by police after they were called to investigate a vandalism spree at Taupo Nui a Tia College. She was taken to Taupo Hospital but died a short time later.
Mr Aim said Karen's death had put strain on his marriage and his relationship with his son.
He said he had been in hospital with breathing difficulties and the time off work had seen him lose around $20,000 in his building business.
Broughton's parents, grandparents and other family members were also in court for his sentencing.
The teenager was also sentenced to six years to be served concurrently for injuring a 17-year-old woman with intent to cause her grievous bodily harm.
That was a separate incident which took place a fortnight before the attack on Ms Aim.
- With NZPA