Married at First Sight star Matthew Gwynne has revealed his biggest fear in his marriage to wife Amber Bowles -- and it's not the possibility of getting divorced.

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During Married at First Sight: Unfiltered's August 7 broadcast, Matt watched back a Season 9 clip of co-star Elizabeth Bice telling her husband Jamie Thompson that her biggest fear in their marriage was the idea Jamie might leave and divorce her on "Decision Day."

RELATED LINK: 'MARRIED AT FIRST SIGHT' COUPLES NOW: WHAT COUPLES ARE STILL TOGETHER? WHO BROKE UP? WHERE ARE THEY NOW? (PHOTOS)

Matt was then asked to reveal his biggest fear in his marriage to Amber.

"Um, losing physical attraction," Matt said.

"Ohhhh," Unfiltered host Jamie Otis demurred.

"Yeah," Matt replied.

Matt and Amber, however, had an immediate attraction at the altar when they met each other on their wedding day. Matt thought Amber was beautiful, and she in turn couldn't help but gush about how her husband was hot and sexy.

The pair also didn't waste any time consummating their marriage, as they slept together for the first time during the first night of their honeymoon in Antigua and both subsequently raved about how the timing was perfect.

Matt also revealed on the Unfiltered episode he and Amber slept together about three or four times a week, and he was typically the person initiating the sexual activity. Amber, however, has said she's a sexual creature and would have intercourse daily if she had her way.

It seemed like Amber and Matt had the physical part of their relationship down one month into their marriage but were both striving to achieve a deeper emotional connection.

However, the 6'9" former professional basketball player said during an earlier episode of Married at First Sight: Unfiltered he had been hoping for a taller bride than just 5'2".

RELATED LINK: '90 DAY FIANCE' COUPLES NOW: WHAT COUPLES ARE STILL TOGETHER? WHO HAS SPLIT? WHERE ARE THEY KNOW? (PHOTOS)
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"I've dated, seriously, like four different girls. One was 5'2" but the others were all six foot and above," Matt revealed. "So I was expecting just a little bit taller!"

Matt then admitted Amber's height was "kind of a disappointment" -- at least "at first."

Matt also didn't seem excited about the fact Amber is a Tomboy and doesn't enjoy wearing makeup.

"I personally like a little bit of makeup and a woman who is into style/fashion," Matt told Reality TV World at the start of the Married at First Sight season.

Matt's Married at First Sight co-star Iris Caldwell -- who wed Keith Manley on Season 9 of the Lifetime reality series -- joined him on the August 7 episode of Unfiltered and also shared her biggest fear.

"My biggest fear within this marriage is Keith not giving me a chance, just about my virginity," Iris admitted.

Iris entered the Married at First Sight process as a virgin, and one month into marriage, the pair had yet to sleep together. Keith addressed on more than one occasion Iris' alleged lack of sexual maturity was a looming "concern" for him.

Keith also apparently felt a lot of pressure about Iris' virginity because he didn't want to take that away from her in case they don't end up together and staying married.

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In addition to Matt, Amber, Iris, Keith, Elizabeth, and Jamie, Married at First Sight's currently-airing season also stars Deonna McNeill and Gregory Okotie.

RELATED LINK: 'MARRIED AT FIRST SIGHT' COUPLES NOW: WHAT COUPLES ARE STILL TOGETHER? WHO BROKE UP? WHERE ARE THEY NOW? (PHOTOS)

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