A court spokesman confirmed the UK women's guilty pleas but said they had not yet been sentenced, Sky News reported.
Both women have pleaded guilty to drugs trafficking.
It means they automatically benefit from a sixth off the minimum jail sentence of eight years and will be sentenced to six years and eight months in prison.
Sentencing has not taken place yet and a new hearing where the women will be sentenced has now got to be arranged.
But it's likely that will take place in around a week's time.
More top news
Harry Brust was first prescribed the drugs to treat a skin condition as a child - but it led to him becoming addicted to heroin.
Low pressure will keep the weather cloudy and wet for many areas overnight.
MPs defeat Labour amendment on 1% cap on annual rises after the Government earlier confirmed the policy would stay after several u-turns.