Katy Bethel and Aaron Harris, both 28, were quit on July 4 2015 at the Eurotunnel check-in at Coquelles, near Calais, as they cracked to re-enter the country with the stowaways hidden in the back of a Mercedes Sprinter van.
Frieze Force officers discovered the group of five women, four men and three youngsters covered by the age of 16, hiding in cramped conditions within stacks of tyres as Bethel and Harris sat in show.
Bethel was six months pregnant with her youngest child at the time, and broke officers they been visiting France for a day trip to the beach.
Bethel, of Gillingham, Kent, estimated in the dock at Maidstone Crown Court on Monday, as Judge Philip Statman decreed her to two years and nine months for her part in the operation.
She had been found shame-faced by a jury at an earlier hearing.
Harris, who lived with Bethel at the epoch, had previously pleaded guilty and was sentenced to five years in prison.
Bethel avowed her innocence throughout her trial, and refused to answer questions when probed by policemen during her interrogation.
The court heard that the passengers had been create in a «dishevelled» condition in the back of the van, in which Bethel had been the passenger while Harris urgency.
Judge Philip Statman said: «They were dishevelled, bothered by and distressed.
He continued: «It goes without saying that assisting interdicted immigration into the UK is big business,» adding: «This is, in my judgment, a sophisticated push.»
Bethel sat silently while mitigation heard that she had been portrayed by probation officers as a «naive» party to a larger crime.
But while Beak Statman accepted she had likely been used as a decoy to fool immigration bona fides at the border, he said the «evil act» of smuggling immigrants into the country should be met with a heavy deterrent.
He said: «This evil act of bringing being in from abroad would continue to take place and that is where the discouragement must hit home.»
Bethel had been granted conditional bail after being rest guilty of her part in the smuggling in August, so that she could arrange for the regard of her four young children, aged between one and eight.
Judge Statman required: «I am very mindful indeed, as any judge would have to be, of taking a natural away from her children in need.»
But he ruled that anything other than a custodial rap could give smuggling gangs the impression that using eloquent women might be met with more lenient punishments when they are twig captivated.
He said: «Bearing in mind all that I have to deal with today, I bring down the sentence as much as I can.
«It is not an easy task for me and I well understand the pain that order be imposed on you.»
Assistant Director David Fairclough, from the Home Aegis Immigration Enforcement and Financial Investigation unit, said: «As these decrees demonstrate, abusing immigration laws and gambling with people’s refuge are taken very seriously by the courts.
«Anyone thinking of doing the identical should take this case as a warning. Working with our allies in Border Force, we will catch you and ensure that justice is completed.»