Charlotte Hobrough hooked up with barrister's clerk Adrian Bauckham while they battled with nature living on a remote island in the South China Sea.
The pair took part in one the biggest hyped television programmes of the year for a chance to pocket the £1m prize.
But viewing figures for the pre-recorded show have continued to disappoint with Anne Robinson's The Weakest Link trumping it in the ratings.
On Thursday night the BBC One quiz show pulled in six million viewers, while Survivor attracted 5.3 million in their shared 8pm timeslot.
This is down 1.4 million on its Monday night debut.
Viewing figures for Survivor picked up once The Weakest Link finished, with 6.6 million watching Jennifer "JJ" Adams voted off the island.
JJ has since said that she is worried that her bossy image on the show could put potential employers off giving her a job.
"I hope employers don't think: 'Oh we don't want to work with her shouting all the time'," she said.
Example
The 37-year-old found she had been made redundant from her job as a PA in South Wales when she returned from the South Sea island where Survivor is filmed.
Adams - who told Hobrough that she was the "fluffiest and most useless" member of the tribe - insists that she was bossy for the sake of the tribe.
"I had tried to lead by example and eventually I was forced to shout," said Adams, a former RAF drill sergeant.
Survivor producers had been banking on ratings as high as 10 million.
Regret
But news of Hobrough's island affair with Bauckham could boost interest in the ITV show.
Holborough, a detective constable from Glamorgan, confessed the brief fling ended as soon as they left the show.
The 24-year-old has returned home to her police constable husband and is determined to sort out her marriage.
Producers of the show issued a statement on behalf of the couple, which read: "We have discussed the affair which Charlotte admitted upon her return and that she deeply regrets.
"We have decided to put this incident behind us and are determined to make our marriage work.
"To achieve just that we would ask the press to respect our privacy at this difficult time."