Not only that, but eagle-eyed fans have spotted flirty messages left on each other's Instagram comments.
In one, Jason commented "Oh my lord," on a selfie uploaded by his rumoured new lady who replied "Oh stop you".
Jason replied to one of KC's post: "Oh that’s it I’m sliding into your dms!" followed by a fire emoji.
"I’m all for this," one fan remarked.
This isn't the first time Jason's been spotted flirting on social media with the season seven bride.
Earlier this month when it was revealed that KC had struck up a friendship with season eight brides Georgia Fairweather and Kerry Knight, the groom, who infamously starred in a homophobic and fatphobic video aimed at bisexual co-star Liam Cooper, didn't hide his feelings of attraction.
In response to Georgia's photo, he penned: "Yeah my girls!!!!!" followed by the fire emoji and after seeing KC's group photo, he cheekily wrote: "Dammmm who that bird on the right??" along with two heart-eye emojis.
Back on her season, KC was partnered with musician Drew Brauer but after they couldn't make a romantic relationship work, she went on to date co-star Michael Goonan.
Though the couple broke up shortly afterwards, the season eight bride admitted she was "sold the dream" of the perfect man.
"He sold me that dream of, ‘I would stop my playboy ways to have a girl like you, you’re such a good girl’. You have to remember too, I had felt really rejected and here I was with this guy telling me everything I’d ever dreamed of hearing," KC revealed to WHO last year.
"I got along with him and I cared about him but I had that voice in my head going: ‘No no no KC this is a danger zone, you shouldn’t go there, you know what he’s like, he’s a party boy, he’ll probably break your heart.’ But when you have someone telling you: ‘You’re amazing, I give you my word, if I had a girl like you I’d change my ways, I want to move forward and have a family,’ it was so full-on and I’d never had a guy say that to me before.
"I got sold the dream and I fell for it."
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