In the third episode of The Block teams need to work together as the as the plumbing for their bathrooms will be in the ceiling of their neighbours below.
And a heated argument breaks out with villain Sara in the thick of it.
Kerrie and Spence delays and they decide to charge Hayden and Sara $776 from the $10,776, they owe them for the 48-hour challenge win, to compensate their builders lost time.
Hayden quietly agrees to the on charge but Sara's not happy: "I don't care…stop making decisions without me. You should have called the boss lady," she rants to Hayden.
Sara then decides to on charge it to their upstairs neighbours Bianca and Carla in the penthouse.
"He's hitting us up for $700, so we're hitting you up," Sara demands.
A heated conversation erupts, between the girls, Hayden and Sara. Bianca and Carla don't feel they have held anyone up and refuse to pay. "No, we don't think that's right," they yell back at Sara. But Sara won't relent.
"I'm not arguing with you, I'm telling you now…" Sara insists.
Spence arrives mid-way through the disagreement and in an effort to keep the peace – says he and Kerrie will just wear the bill after all. Now no one owes anyone anything anymore.
"Forget it," he says miserably.
So far, Sara has caused all sorts of issues throughout the show.
In the premiere episode she was caught trying to steal Bianca and Carla's door and had a heated discussion with the pair when they tried to retrieve it back.
That said Sara's feisty antics have worked for her so far with her and Hayden scoring winning points for the show's first 48 challenge.
They spent the highest amount out of the contestants splashing out over $10,000 on their room, but their investment appeared worthwhile, with the pair winning the challenge overall scoring 25 ½ out of 30.
Judge Shaynna loved the wall niche and circus style bedhead, while Neale thought the room had a 'really lovely feel about it.'
Darren loved the rooms layout. The finish of the skirting boards and bad paint work near the desk, were Hayden and Sara's only faults in the judge's eyes.
Sara was delighted with the feedback shouting "best team on The Block!" when Scott announced the win.Never to mince her words, the outspoken flight attendant has previously declared: "We're the A team. The best team on The Block!"