Neighbours spoilers follow.

Neighbours has confirmed a second key character who catches out Holly Hoyland and Andrew Rodwell in their affair storyline.

Although the duo are both in relationships, with Max Ramsay and Wendy Rodwell, respectively, they give into their mutual attraction next week.

Unfortunately for them, Rhett Norman witnesses it and tells his boyfriend Aaron Brennan about it. Aaron doesn’t believe his new fella so he confronts Holly and she spins some theories about why Rhett might lie about it.

aaron brennan and rhett norman in neighbours

Prime Video / FremantleMedia Australia

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In a new trailer uploaded to the soap’s official Instagram account, Aaron goes to Andrew and says that he’s now caught them out himself.

“I saw you,” Aaron says to him. “Are you going to tell me the truth?”

We know that Aaron is set to leave the soap in the next few weeks, but will he expose the affair before he goes?

The caption alongside the trailer hints that the secret will be revealed somehow, as it states: “Forbidden lust is about to tear Ramsay Street apart…”

Related: Neighbours star breaks silence on Byron’s exit after two years

Also in the trailer, Andrew grapples with his feelings for Holly, saying: “This can’t happen. We agreed. There can’t be anything more between us. My feelings for you, they’re real. It’s just they’re wrong. I’ve got a wife. I’m married and you’ve got Max.”

It should also be noted that Aaron actor, Matt Wilson, was spotted on set for the final few days of Neighbours’ production.

Does that mean that Aaron will be back in December for a final on-screen appearance?

Neighbours releases new episodes from Mondays to Thursdays for free on Amazon Freevee and Prime Video in the UK and US. In Australia, the show airs from Mondays to Thursdays at 4pm on Channel 10, with a 6.30pm repeat screening on 10 Peach Comedy.

Read more Neighbours coverage on our dedicated homepage

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