Katie, who is believed to have been dating senior design engineer, Scott Bate, 30, for 18 months said: “I just want everyone to know what’s what and that we are all happy.”
Mark previously opened up about his wife in an interview with The Sun, he explained: “When Katie first came clean to me about her boyfriend, I’d had an inkling.”
The Chase star continued: “But right from the start, my attitude was quite pragmatic — this was spilt milk, what could we do about the situation to make it OK?
“We had a family. We couldn’t just throw that away lightly. There were other considerations.”
The Chase airs weekdays on ITV at 5pm.