Sherry Young told station CFJC that she knew 48-year-old Dennan Crosby only as a former colleague and was not his ex-girlfriend as reported earlier. Police continue to maintain the pair had a six-month relationship last year.
Young, 44, said she and her four children, along with her boyfriend, David Modore and his two kids, were arriving home last Thursday evening when Crosby pulled up in a white van.
She said Crosby had a "crazed and wild look in his eyes" and that the adults tried to get everyone in the house.
As the front door was being closed, Crosby forced his way in with the barrel of a gun, which went off in front of her face, Young said Tuesday.
"As we were entering the house, Denann had the gun aimed at David's chest as he had turned around to shield three of the five children. My 11-year-old son later said that he thought David was going to die."
While Young's boyfriend and the children escaped, Crosby held her hostage.
"He kept taunting me by showing me all the things that he had in his bag that he had planned to do to me. One of them was a fire starter and he was going to spray it on me and light me on fire," Young said.
"He made me watch a video of his test explosions of the explosives that were on his chest on a harness."
RCMP Staff Sgt. Grant Learned told a news conference Tuesday that Young and Crosby began seeing each other casually starting in April 2011.
"This went on for a couple of months," he said. "And they began dating after that and this continued on until the early part of September, when the relationship started to wane."
Modore said on the weekend Young would have died if a police negotiator who was speaking to Crosby by phone hadn't persuaded him to let her go.
Crosby released Young just after midnight Friday, and about 10 minutes later, the phone went silent as the negotiator was speaking to the man who set off explosives that killed him and caused a fire.
Young's home was destroyed in the inferno.
Crosby had also wired explosives into his van, complicating police and fire response to the incident that lasted more than seven hours.
Young said Crosby told her he had driven around with a pipe bomb in his van for a month before acting.
Police said the Surrey, B.C., man was an electrician by trade and provided specific details to the negotiator about how the explosives were wired.
His remains were found in the rubble on Saturday.
(CFJC, The Canadian Press)