The distraught mothers of three young children raped by their aunt have recounted how their families' lives were shattered by the horrific sexual abuse.

The young boys, aged between nine and 14, were abused by their 45-year-old relative over a period of three years in a small town in Far North Queensland.

She also regularly abused her own son while the boy was aged between seven and 12.

The woman, an office worker who cannot be named to protect the victims identities, was charged by police in January and pleaded guilty to 14 child sex offences.

The Far North Queensland woman, 45, has been jailed for multiple child sex offences

On Monday she was jailed for nine-and-a-half years, with Judge Dean Morzone choosing not to set a parole eligibility date.

One mother spoke out in a victim impact statement, highlighting the emotional and psychological toll of the abuse on her youngest son, who was just nine years old, the Cairns Post reported.

She said her previously happy son was now reserved, medicated and suicidal.

'He may never be the person he was supposed to become,' she said.

'We trusted you [the offender], we loved you, you destroyed us.'

The court heard that the accused raped the boy for about an hour, and threatened to 'expose him' over social media if he resisted.

The mother of the older two boys, aged 12 and 14, said she began to doubt her ability as a parent after noticing their behavioural changes.

She said her youngest son has since left school, and is suicidal with substance abuse problems.

'I no longer recognise my own son, [this offending] makes you [the offender] nothing short of a monster.'

The accused admitted to the offending in a pre-arranged phone call undertaken by the 12-year-old victim, which was recorded by police.

The offender is being housed in a special protective unit in the Brisbane Women's Correctional Centre, where she is likely going to stay for her entire sentence.