Tuesday night's episode then cut to a preview of Wednesday night's dinner party which sees Michael deny he kissed Hayley while Stacey sobs.
"You macked on with me, sweetheart, you did it, man up," Hayley tells Michael.
But the biggest shocker comes when Hayley is shown revealing a video of David using her toothbrush to clean his excrement off a toilet bowl. In media interviews since, Hayley has said that she continued to use the toothbrush for days afterwards.
"That is disgusting," expert Mel Schilling said.
"That is too far for me," Mishel added.
But that wasn't the only drama of the night. Cathy and Josh were at each other's throats again, Chris and Vanessa (who?) left the experiment, and Ivan and Aleks tackled an awkward family lunch.
But the clencher came when Natasha and Mikey sat down for lunch with their parents.
"It's tough," Mikey tells the table. "There are days when we want to tear each other's hair out."
Mikey went on to tell both parents that Natasha made an "inappropriate joke" about him (that he only lasted 20 seconds when they first had sex as he got a leg cramp) and that he still had misgivings about their relationship.
"If it's causing stress and strain, it's not worth it," Natasha's father told the pair, before Natasha fled the table in tears. "It's meant to be fun.
"I don't think you will be able to get over the top of it. You are better off maintaining some dignity and respect for each other and go home."
But how will they boost their Instagram following if they pack it all in so early?
Instead, Mikey went for a vino with Natasha's mother where she helped to smooth tensions over ... until next time.
