It was the start of Homestay Week in the experiment on Monday’s episode of Married At First Sight.

And feisty bride Gia Fleur turned out to be the house guest from Hell for groom Scott McCristal, 32, leading to more tension in the already shaky relationship.

After entering the businessman’s spotless waterside pad on Queensland‘s Gold Coast, the 35-year-old unleashed a string of complaints.

From Scott’s decorating choices to his standard of cleanliness, the nightmare bride was relentless in her criticism.

But it was the discovery of a pink neck pillow in Scott’s massive walk-in wardrobe that led to an uneasy homestay for the pair.

Gia became instantly suspicious of Scott’s earlier claim that he had never hosted a female in his sprawling home after finding the travel accessory.

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Gia Fleur (pictured) turned out to be the house guest from Hell for groom Scott McCristal, leading to more tension in the already shaky relationship

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After entering the businessman’s spotless waterside pad on Queensland’s Gold Coast, the 35-year-old unleashed a string of complaints. Pictured: Scott

Questioning its colour, Gia later termed the neck pillow as a ‘woman thing’.

At one point, she asked Scott point-blank whether it belonged to ‘his ex’.

As the show kicked off, Scott expressed his excitement and enthusiasm to welcome his bride to sunny Queensland.

But Gia quickly killed the mood as soon as she walked into his house, calling it ‘messy’ and attacking Scott’s standard of cleanliness.

‘I’d be lying if I didn’t say I was coming in looking for a problem or something to have a problem about – that’s just what women do,’ she said in her confessional.

Appearing uneasy about Gia’s negative attitude, Scott told producers: ‘If the roles were reversed and I was at Gia’s house, I would only say nice things – end of story.’

But it was the drama over the neck pillow, which Scott said was a gift from friends, that led the couple to deal with deeper issues in their stormy pairing.

‘Do you fully 100 per cent trust me?’ Scott asked Gia after a tension-filled couple of days.

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It was the discovery of a pink neck pillow in Scott’s massive walk-in wardrobe that led to an uneasy homestay for the pair

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Questioning its colour, Gia later termed the neck pillow as a ‘woman thing’. At one point, she asked Scott point-blank whether it belonged to ‘his ex’

Gia said she did not ‘understand’ the question, which led Scott back to the neck pillow saga and his feeling that the relationship was full of ‘suspicion’.

Appearing frustrated, Gia then told him: ‘Put yourself in my shoes to see how it might look, as an outsider coming into your home. You have said you’ve never had a woman in your place, and you have a woman’s (item).

‘From my point of view, it looked a certain way.’

A clearly rattled Scott then aired his unease over his bride’s notoriously hot temperament.

‘Sometimes I feel I’m walking on eggshells because you might misinterpret [my comments] the wrong way and get defensive.’

A clearly unimpressed Gia replied: ‘Thanks, Scott, I don’t really want to argue today.’

Scott admitted that he was not sure he and Gia had a future due to the constant drama, and confessed he had not made a final decision on their relationship.