This article contains details, including depictions of violence, which some readers may find distressing.
Without the interventions of her family and friends, Amy says she would have married the man who had physically and psychologically abused her for much of their relationship.
Had the wedding gone ahead, she fears he would have eventually killed her.
Christopher Malcolm, a serial rapist who was recently jailed for his crimes, inflicted life-changing injuries on his former fiancée - on one occasion she said he left her face "black and blue" just before she visited her terminally ill father for Father's Day.
Amy, not her real name, told the BBC that staying in the relationship was often a means to calm the violence and survive. So long as Malcolm was free, she said she did not feel safe enough to report him to police.
Her loved ones, meanwhile, grew increasingly worried. On several occasions they reported their concerns for Amy's welfare to Police Scotland's disclosure scheme for domestic abuse, external (known as Clare's Law in England and Wales), and handed police evidence including text messages and photos of her injuries.
This ultimately helped officers build a strong enough case to arrest Malcolm, who was taken into custody in September 2024. Shortly afterwards, Amy gave a full report of the rapes, assaults and abuse she had been subjected to.
She had been due to marry Malcolm four weeks later.
Without Amy's knowledge, four people separately reported their concerns to police. Malcolm was arrested and released on bail after the first report, but evidence continued to mount and officers urged Amy to make her own statement.
"They were very explicit with me," she said. "They said 'if you don't make a statement we're going to find you in a ditch at the side of the road'.
"I remember that hitting me really, really hard because I'd never really had someone say something so candidly to me before. I was very aware that this was potentially a possibility at some point, if I continued."
Amy, now aged 30, approached the BBC to tell her story as she believes her family, friends and the police officers involved in her case ultimately saved her life.
In her case, she said, the system worked.
Police Scotland said that in cases where abuse survivors are reluctant to make reports, officers will look for a whole range of evidence that is not dependent upon the survivor.
This includes body-worn video, phone analysis, injury photographs, medical evidence and histories of previous incidents or evidence from previous partners. Such evidence can allow cases to proceed if there is a realistic chance of conviction.
A spokesperson for the force said the information Amy's family and friends gave was "crucial" in painting a picture of Malcolm's offending.
Following a trial involving 56 witnesses, Malcolm, 37, was convicted of crimes against four women in Lothian and Moray, including Amy, stretching as far back as 2008 when he was still a teenager.
He recently lodged an appeal against his 16-year sentence.