Her mother Roberta Synclair, 63, believes Mrs Plummer is being prosecuted for drug trafficking but told The Sun: ‘She had no idea she was doing anything wrong.
‘The painkillers were placed at the top of her suitcase, she wasn’t hiding them.
‘We’ve been told she’s facing either 25 years in prison or the death penalty. We’re beside ourselves worrying that they’ll make an example of her.
‘She’s gone through the worst pain imaginable – she’s going through hell.
‘I’ve been out twice to see her and going out again so I can see her on Thursday.’
Mrs Plummer was held for five hours at the airport with no interpreter.
She then signed a statement she believed would allow her to leave.
Mrs Plummer is said to still be wearing the same clothes she flew out in and was handcuffed to a gun-wielding policeman when she first appeared in court. She is due to appear in the dock again on Thursday.
Her mother claimed she looked ‘dead behind the eyes’ and repeatedly begged for help as she faced judges.
Drugs and the death penalty in Egypt
In Egypt capital punishment is carried out by hanging. The state carried out at least 44 executions last year.
Possession, use and trafficking illegal drugs can be punished with death.
Carrying small amounts can result in lengthy prison sentences of 25 years.
It is common for people convicted to life imprisonment in drugs cases to face life imprisonment with no chance of parole or pardon.
In 2015 Cairo Scene reported that tramadol was the ‘most abused drug in Egypt’. An anti-addiction hotline found that 40.7 per cent of drug users take the painkiller.