Since 6-year-old Lauren was stabbed to death by mom, Allison’s, (then) boyfriend, David, five years ago, Allison says her surviving children have found their own ways to cope with the loss.

TELL DR. PHIL YOUR STORY: Have a story Dr. Phil won't believe?

“When she’s not being forced to talk about it, it’s like it didn’t happen,” says Allison of Lauren’s twin in the video above. But Lauren’s older brother, she says, had a tougher time after Lauren died; blaming himself for years. She says he tells her he wishes that he had “done something” that day. “We just keep telling him that ‘you did exactly what I would want you to do, and you stayed safe.’”

WATCH: A Grieving Brother’s Life After His Little Sister’s Senseless Death

The grieving mom says she worries about how the traumatic experience will affect the children as they get older. “I hope they don’t lose hope. I hope they keep trying for happiness and love.”

As for herself, Allison says she feels like she has been “divided in two” since Lauren died.

WATCH: Estranged Exes Come Together Seeking Justice For Their Slaughtered Child

On Friday’s Dr. Phil, Allison reveals what she claims David told her about his past in the days before Lauren was violently killed.

WATCH: ‘I Woke Up To The Sounds Of My Daughters Screaming,’ Says Mother Of Slain 6-Year-Old

Check here to find out where to tune in.

TELL DR. PHIL YOUR STORY: Have a headline-making story in a small town?

Dad Who Says His Alcoholism ‘Spun Out Of Control’ After His Daughter Was Killed, Claims His Ex Won’t Let Him See Their Other Kids