Couple abused two other boys in their care, including caging one of them

Pair convicted in May of torturing and killing Trelfa's son Liam, two

Questions have been raised as to how a lesbian couple who were jailed for a combined 47 years for killing their child were allowed to steal a kiss while attending an official meeting outside of prison just five months into their sentence.

Civil partners Rachel Trelfa, 31, and Nyomi Fee, 29, met in Glenrothes, Fife, and were spotted locking lips by shocked witnesses, despite being chained to security officers.

They were convicted of murdering Trelfa's son Liam in May. He had endured two years of horrific abuse and neglect before he died at his home in March 2014 as a result of heart injuries.

Dunfermline and West Fife MP Douglas Chapman said the security force in charge of the pair, believed to be G4S, allowed the 'unacceptable' incident to occur.

Rachel Trelfa (left) and Nyomi Fee (right) were found guilty of murdering the defenceless two-year-old in May. They are pictured earlier this year outside court

Tiny Liam Fee, pictured, was killed in March 2014 after enduring two years of torture

He said: 'They [security] need to be responsible for the couple's actions. I don't know the full ins and outs of the incident, but I think something like this would not be acceptable.

'I think they [security] should explain why these circumstances have been allowed to occur.'

Trelfa was sentenced to a minimum of 23-and-a-half years behind bars, while Fee - described by police as 'domineering' - must spend at least 24 years in prison.

A shocked eyewitness told the Daily Record he saw two G4S security vans behind a shopping centre, and both the prisoners were there at the same time.

They are believed to have been attending meetings at Fife’s Kingdom Centre.

He said: 'The vehicles caught my eye before I saw them – they are a very distinctive couple. It’s difficult to miss Nyomi – she’s a very large and imposing figure.

Rachel Fee (left) who is also known as Rachel Trelfa, and her partner Nyomi Fee (right) who were convicted of murdering two-year-old Liam

'They were both chained to a female officer and there were four other male security guards too.

'It looked like they’d come out of the registry office, which I thought was odd because they’ve already had a civil wedding.

'Nyomi’s face was tripping her until Rachel moved over and gave her a kiss before they climbed into separate vans. It was very unusual but the guards were pretty relaxed about everything.'

It is understood the pair, who are both in separate prisons, were allowed out for personal meetings.

A spokesman from the Scottish Prison Service told the Mail Online: 'Prisoners attend a variety of different meetings as required by the parole board and children's panels and other such bodies.'

But he added: 'We don't comment on individual prisoners.'

Liam Fee died in March 2014 from heart injuries after suffering two years of horrific abuse

Tragic Liam had suffered fatal heart injuries similar to those found on road crash victims and spent the last few days of his short life in agony from an untreated broken leg and fractured arm.

He died when his heart ruptured from blows to his chest – and a pathologist found he had more than 30 injuries, including a fractured upper arm and thigh.

The pair - originally from Ryton, Tyne and Wear - were also behind a catalogue of unspeakable cruelty against two boys in their care, one of whom they tried to blame for Liam's death.

The pair were told they will be in their 50s before they are allowed to apply for parole

Their trial heard that one of the boys had been imprisoned in a cage made from a fire guard, with his his hands tied behind his back.

Another boy was tied naked to a chair in a dark room with nine snakes and several rats, forcing him to eat his own vomit and telling him a boa constrictor ‘ate naughty little boys’.

At the High Court in Edinburgh, judge Lord Burns handed both women life sentences and indicated they would be in their 50s before they can be considered for release.