'Someone is lying': MAFS experts push Dave to reveal the truth as his marriage to Jamie hangs in the balance

Jamie and Dave were once Married At First Sight's strongest couple, but now their entire relationship hangs in the balance.

In an emotional trailer for Sunday's Commitment Ceremony, Jamie and Dave sit on the couch as the experts try to figure out where it all went wrong for these two.

And expert John Aiken thinks "someone is lying".

Stream every episode of Married At First Sight for free on 9Now

With tears in her eyes, Jamie faces Dave and says: "I don't believe you at all."

Watch the heartbreaking trailer in full in the video above.

As the experts plead with Dave to "open up and let us in," it looks like the only way forward is the "raw heart-wrenching truth".

But what will Dave reveal?

EXCLUSIVE: Watch Evelyn and Duncan's jaw-dropping reactions as Dave backflips on his marriage to Jamie

Jamie and Dave aren't the only couple at a crossroads in their relationship.

Another groom admits to feeling inadequate to his wife while she delivers a damning ultimatum.

"I cannot be with someone that won't support me," she blows.

Just when you think things can't get anymore heated the experts are shocked as one bride ups the ante in an extreme way.

"If I'm in a coma, I need to know my husband is going to step up to the plate," she paints a grim future.

READ MORE: MAFS' Domenica Calarco announces she is pregnant with her first child

Find out just whose relationship is on the rocks by watching the sneak peek above.

Married At First Sight airs Sunday at 7pm and Monday to Wednesday at 7:30pm on Channel 9 and 9Now.

Need more MAFS? Season 10 stars Evelyn and Duncan recap this week's explosive Dinner Party.

Stream every episode of Married At First Sight for free on 9Now

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