Speaking on Tuesday'sLoose Women, Mark revealed that he and Katie - who have a huge age difference of 27 years between them - have been "through a rough patch."
"Like a lot of relationships, you go through a rough patch. We’re working our way through it," he told the panel.
WhenLoose Womenhost Denise Welch asked him if they were still together, Mark showed his wedding ring.
The professional quizzer also discussed their desire to stay out of the public eye, especially when it comes to their son.
"A newspaper offered us a sum of money and we kindly denied. We're quite private, there's no pictures of our son online and I'm not going to name him until he's old enough to make the decision," he said.
WATCH: The Chase's Mark Labbett confirms he is still with cheating wife Katie
Just four months ago, Katie confirmed their split shortly after the couple had adamantly denied claims of marital struggles.
In a candid interview withThe Sun on Sunday, Katie said: "Mark and I had been talking about separating for some time — we have been drifting for a while. He works away a lot and that’s been hard. A lot of people think it’s the age difference but we don’t see that as the factor."
Furthermore, the 26-year-old also revealed that she had found happiness with the man she cheated with - Scott Bate, 28.
"It’s more that we don’t have mutual friends, and our lives are just very different. I met Scott by accident, on a night out, and we just clicked. It wasn’t intentional, it just happened."
Shockingly, the mother-of-one even admitted that Mark knew all along and was "incredibly understanding."
"Mark always knew — straight from the off I was honest. He knew I was going out and who I was seeing. He was incredibly understanding. If it was anybody else it wouldn’t matter, but because Mark’s in the limelight people have been gossiping.
At the time, Katie had said that the couple remained good friends and insinuated that they had peacefully gone their separate ways.
Mark 'The Beast' Labbett has confirmed that he is still with his wife Katie despite her cheating on him with a younger man named Scott Bate.
However, Mark's recent revelation has suggested otherwise.
The Chase star admitted toLoose Womenthat his busy schedule may have been a huge factor in their rough patch, noting that he only had one free Monday off until Christmas due to his work on the ITV show.
Juggling both The Chase Australia and The Chase UK may also have contributed to his dramatic weight loss.
Mark admitted that it was "the joy of running around a little one, I don't have time to eat! I got down to 25 stone, at my heaviest I was 29 stone."
Katie and Mark - who tied the knot at Arundel Castle, West Sussex 2014 - are also shockingly second cousins.
In another interview withLoose Women, Mark said that they hadn't been aware of their connection when they began dating.
WATCH: Mark Labbett reveals how he met his wife Katie
"It was one of those things that happened," he told the panel.
Katie’s dad and Mark's father are first cousins, meaning the pair are second cousins.