The 44-year-old former glamour model and 33-year-old car deal are said to be “in a really good place” following split rumours.
Katie was recently pictured without her engagement ring at a family gathering, sparking speculation that the pair had called it quits.
It had also been claimed that the mum-of-five had been making it 'obvious' she was single during a solo night out in Brighton last month.
Katie, who's romance with Carl was said to be "on the rocks", reportedly complained that she and Carl were "rowing non-stop" on their Thailand holiday, during which Katie fell ill.
At the end of last month, Carl set the record straight in an expletive-filled rant on Instagram.
Filming himself inside Katie's Mucky Mansion, Carl rants: "All of you are full of s**t," as Katie walks past in the background he moves the camera and says: "Look, here she is. I'm still at the f**king house. All this, 'Oh we want her shot of him'. Why don't you all just f**k off?
"Because you know something, you wanna know the truth? I'm the best f**king fella she's ever had. And I'm the one that suffers the s**t, no one else.
“So all this, 'Oh he's a bad person, he's this he's that, he needs to go...' F**k off everyone because you're full of s**t.
“I'm the one that's on the frontline, I suffer the s**t and I'm the one that helps her, no one else.”
After all of this, a source now claims that “despite what people might think”, the pair are “stronger than ever” and a wedding is “most definitely on the cards”.
“It could be happening a lot sooner than expected,” they told New! magazine.
The source added the pair, who have been dating since June 2020, have “already started looking at wedding venues in Italy and Spain”.
“Katie wants to have a small ceremony abroad,” they added.
“She is adamant that she doesn’t want a beach venue and wants something different and more magical, possibly a Sicilian vineyard or something similar.”
The source claims the couple only want close friends and family there to “make it really special” and that the ceremony “needs to be initiate and romantic”.
Carl opened up about the effects the split rumours are having on him in a recent TV interview.
“The truth never sells and this is what I’ve learnt. I’ve never experienced anything like this in my life,” he said during an appearance on GB News.
“Unfortunately for Kate, she doesn’t know any different. I know what it’s like to have a normal life. When these things are happening, it’s just completely and utterly unfair.
“Everybody’s got feelings. I’m lucky that I’ve walked into Kate’s life and I’m thick-skinned, there isn’t much that gets to me.
“I live with a woman who’s had this for years and years and years and has been mentally damaged by it really and it’s not fair and it’s not right.
“There should be something in place to make a change.”