Watch: Cameras capture the heartbreaking moment Kylie and Brad speak for the first time as she makes a huge relationship call

Kylie has returned to The Block to finish House 4 with husband Kylie, but all is not forgiven.

In Wednesday's episode, Kylie confronted Brad about where their relationship stood after his 'inappropriate', flirty exchange with Mimi.

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"If I gave up we'd leave with nothing – so whatever we get, even if it's $10,000. I'm taking half of what you get," she said.

"I don't even know if I'm staying in Cairns, there's nothing there for me anymore."

Watch the full exchange in the video above.

WATCH: Maddy and Charlotte are the first to rally around Kylie as she returns to site

Kylie revealed what her "biggest problem" with the exchange was, as Brad apologised.

"Sorry doesn't even come close," he told her.

Kylie said Brad had "annihilated our entire relationship", declaring them each "single people".

EPISODE 47 RECAP: Kylie confronts Brad for the first time

In Monday's episode, Kylie fled home to Cairns after Brad admitted to flirting with Mimi during a Saturday night hang out between House 4 and 5.

In a heartbreaking piece-to-camera, Brad expressed his regret.

"I'd very much say that I've just single-handedly destroyed my family," he said.

The Block continues Sunday at 7pm and Monday to Wednesday at 7.30pm on Channel 9 and 9Now.

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Stream every episode ever of The Block for free on 9Now.