In a surprise twist, the OnlyFans creator was pictured kissing another man right in front of Jackson on Friday.
The star hit it off with a British filmmaker called William at the Believe Advertising Halloween party and spent hours chatting.
Meanwhile, Jackson was spotted getting cosy with a stunning brunette across the bar as Olivia left the party with William.
A source tells Yahoo Lifestyle: “Olivia and William seemed quite smitten with each other and there were a lot of sparks. He’s only just arrived in Australia and has no idea what Married At First Sight is or who she is, which she loves.”
The insider also quashed the rumours that Olivia and Jackson are planning to get back together.
“Olivia and Jackson are completely over and have had a conversation about moving on and meeting new people.
"As they still have the same group of friends and attend the same events, they knew something like this would eventually happen at some point. Jackson is happy for Olivia,” they say.
After The Wash posted snaps of the mystery man on Instagram, Jackson threw in his two cents.
“Yayyyy Liv and Will,” he commented, before fans started calling the hookup a ‘publicity stunt’.
“These two would do anything for publicity. I mean, seriously, who in their right minds would want to date either of them?” one person commented.
“Jackson can’t you come up with a better pathetic attempt at a publicity stunt? Trying to get in desperately quick before the new series starts and you’re all forgotten,” another pointed out.
“Everything they do is a [publicity] stunt craving attention, that’s why we’re all sick of them,” a third chimed in.
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