Married at First Sight star Mia Bally left her husband Tristan Thompson and said she wants a divorce, while Dave Flaherty admitted he's "on the fence" about whether to file for divorce from his wife Amber Martorana during Tuesday night's Season 7 broadcast on Lifetime.

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The three Dallas-based couples who tied the knot at first sight this season were Tristan, a 29-year-old former collegiate and semi-pro basketball player who recently started a tutoring center business, and Mia, a 29-year-old airline recruiter; Amber, a 36-year-old division order analyst, and Dave, a 37-year-old senior portfolio manager; and Bobby Dodd, a 27-year-old project manager, and Danielle Bergman, a 30-year-old account executive.

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They were matched by the following Married at First Sight experts: Psychologist Dr. Jessica Griffin, sociologist Dr. Pepper Schwartz, and marriage counselor Pastor Calvin Roberson.

The Married at First Sight broadcast began on Day 46 of marriage, with Amber hosting a gathering for Mia, Danielle and herself at her house. Mia was looking forward to catching up with the ladies since she missed "Field Day."

Despite having recent struggles, Mia was optimistic her marriage would work out. Tristan, however, missed the night out with the guys, claiming he was "sick."

"I'm not surprised Mia showed up alone. Literally the last time we talked to her, Tristan had just kicked her out of the house!" Danielle told the cameras. "Maybe he is sick, but I think he just doesn't want to come around."

Mia admitted to the girls she was "super timid" about living with Tristan again because she feared such an incident could happen again. Amber could tell Mia was "confused, tense and uneasy." Even Danielle admitted she wouldn't have moved back into his place so quickly.

"He just kicked you out! He's not as committed to you at all," Danielle told the cameras.

RELATED LINK: 'MARRIED AT FIRST SIGHT' STAR MIA BALLY FILES FOR DIVORCE FROM HUSBAND TRISTAN THOMPSON

Amber could relate to Tristan a little bit because she said she also has a temper. She expressed to the girls how one minute, she had a great connection with Dave, and then the next minute, she wondered if Dave even liked her.

"He said during this process I've been really stressed and negative and he kind of has a hard time seeing a future with me because of my attitude," Amber told the girls, adding that Dave's reassurance and words of affirmation were still lacking.
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Amber was afraid Dave may decide to divorce her on "Decision Day," but everything was still going smooth and almost perfectly for Danielle and Bobby. Amber noted Dave definitely wasn't as crazy about her as Bobby seemed to be about his wife.

Meanwhile, Bobby and Dave had "a man date" and bonded over some tacos, beers and a game of Jenga.

Bobby gushed about how his marriage was "epic" and "perfect," but Dave had a hard time believing a relationship could have zero issues, annoyances or arguments. Dave wondered if Bobby and Danielle were "sweeping things under the rug."

Dave asked Bobby if he worried tension was going to build up and boil over because they weren't being open about their problems, but Bobby denied there was any resentment and became a little defensive.

RELATED LINK: 'MARRIED AT FIRST SIGHT'S DAVE FLAHERTY: I STAND BY MY COMMENT I WOULDN'T HAVE MARRIED AMBER MARTORANA IF I'D KNOWN WHO SHE DATED

Bobby then asked how Dave was feeling with "Decision Day" coming up given he was concerned about how Amber would face adversity in their future together, and Dave said he was completely "on the fence."

On a scale from 1-5 when gauging his confidence level in choosing to stay married to Amber, he flat out said, "a five."

Dave explained Amber is a great woman and there were reasons to be encouraged, but at the same time, there were reasons to be discouraged and he only wanted to remain married if he could truly picture "forever" with her.

That night, Mia went home to Tristan and confirmed he truly was sick and had a fever. Mia did everything she could to take care of him, and Tristan appreciated having his wife by his side.

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On Day 47, "Decision Day" was only a week-and-a-half away. Dave was fully committed to his marriage although the road had been bumpy, and Tristan was also optimistic about his future with Mia.

As for Bobby, he met with his parents for lunch to discuss his relationship with Danielle.

Bobby felt confident in his marriage, but Danielle had yet to say, "I love you," back. Bobby's mom could see how much Danielle cared for him, and Bobby hoped to achieve a marriage just as strong and long-lasting as his parents' marriage.

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Meanwhile, Danielle checked in with her mother via video chat, and she said things were going very well between Bobby and herself. Danielle's mother called them "a natural match" and pointed out how they have a lot in common.

However, the topic of children scared Danielle because she wanted to wait a few more years before welcoming kids into the picture.

Amber was then shown calling her sister Jamie and venting about how Dave's expectations were very high and he had a tendency to judge her and be critical of her behavior.

Jamie said Dave must understand Amber is adjusting to being a wife to a stranger in a brand new home. Jamie hoped Dave would be more "understanding and patient" with Amber and make her feel better, rather than make her feel worse about her actions.

Amber felt somewhat alone, and she confessed to her sister it wasn't a good feeling.

On Day 48, Dave met with his best friend Adrian, who advised Dave to "blow up" Amber's insecurities by convincing her she's beautiful and exactly what he wants in a woman. Adrian explained women are intuitive and so, sometimes, words don't mean much.

RELATED LINK: 'MARRIED AT FIRST SIGHT' STAR TRISTAN THOMPSON REVEALS WHY HE DIDN'T PRESS MIA BALLY ON ARREST STORY THAT DIDN'T MAKE SENSE

Adrian said he liked Amber a lot and liked her a lot for Dave, so he hoped the marriage would persevere.

Afterward, Mia called her mother, Sybil, to update her on things and receive some advice as well. Mia knew Sybil could be "tough and critical," but she needed some honesty. Sybil revealed she really liked Tristan a lot and he seemed like a great guy but the couple needed to work on trust.

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Tristan also had a gathering with his best friends, Goober and Marcus. Tristan shared that Mia was fighting hard for their marriage but he was "feeling torn" given he's a "realist" and "facts are facts." A lot had happened that made Tristan feel "uneasy" and they had a shaky foundation.

Tristan wanted to get to a place where the fighting would stop and love would be unconditional or else he must opt for divorce.

The following day, each couple embarked on a road trip designed to remind them they had a lot to fight for. Dr. Pepper Schwartz suggested a weekend away would enhance communication, fun and desire.

Amber was especially happy to get away because she worried deep down Dave might ask for a divorce. She said the vacation was exactly what they needed. Mia was also thrilled to get "a second chance" at her honeymoon with Tristan.

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Dave and Amber headed to San Antonio, TX; Bobby and Danielle went to Broken Bow, OK; and Mia and Tristan traveled to Austin, TX.

Danielle expressed to Bobby how Mia might have been sugarcoating things in regards to her relationship with Tristan, as she would never personally forgive Bobby for kicking her out of their home.

And the topic of "kicking" Mia out led to an explosive argument between Tristan and Mia on the drive to Austin.

"I talked to Dave this morning and he told me something that really upset me. So I have a lot of built up resentment towards Mia," Tristan confessed.

The pair argued in the car over what really happened that day. Mia stood by the fact Tristan packed up her bags and kicked her out, but Tristan was under the impression Mia had threatened to leave and so he just enabled her to do what she wanted to do.

"The perception was I make all the decisions without her, she feels she doesn't have a voice, I take all of my frustrations out on her, and I kicked her out because I'm unhappy with how she is as a wife -- and that's all bullsh-t," Tristan insisted.

"Mia paints the picture that she is a victim almost each time, and it makes me feel pissed off. Because once again, she goes back to that place of being passive aggressive and trying to throw me under the bus," Tristan said.

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Tristan was upset Mia had allegedly made him look like "a monster" and a "bad husband." As Tristan ranted and raved, Mia remained quiet in the car and believed they were talking in circles and dwelling on the past.

Mia realized Tristan might want out of the marriage, and Tristan felt "disrespected." He was "sick and tired of being sick and tired" and repeating arguments. Both individuals were disappointed in each other.

On Night 49, Dave gushed about how he had sex with his wife every single night. While they had their share of problems, the physical chemistry and connection was not lacking. Dave, in face, admitted he could see himself "falling in love with Amber."

"We've already gone through so much -- so much hard work. We're kind of just beginning to learn how to be better for each other," Amber told the cameras.

"I think we still have a lot of work to do before we can really decide if we want to stay together or not, but I feel like there is enough good stuff there that I would like to stay together and I'm hoping Dave feels the same way."

Meanwhile, Tristan and Mia pulled up to their hotel, and Mia had been crying for almost two hours straight. Tristan hated living in the past, but he didn't know what to do. He was feeling "lost, discouraged, confused and hurt."

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Tristan loved Mia, but he didn't want to live like this. While they could have discussed the argument that night, Mia was exhausted and just decided to go to bed. She asked to talk things over in the morning.

"I just feel like he doesn't acknowledge the sacrifices I have made to accommodate him. I moved into Tristan's house and I agreed to move to Houston, and he's too focused on the past, and I don't know what to do right now. I'm feeling really hopeless," Mia said in a confessional.

The next morning, Tristan woke up and Mia was gone, along with her bags.

"We are in Austin right now. It's supposed to be our second honeymoon, but Mia has packed her bag. She's gone. Last night, we were laying in bed and she started having a panic attack, and I went to go console her and brought her back to bed and started rubbing her back," Tristan said in a confessional.

"I fell asleep, she woke me up, and then she said, 'Tristan, I want a divorce.' So she started packing up all her stuff and she left. I called the other couples, and no one knows where she is. Everybody has been calling her, but she is gone."

Tristan continued, "It was a lonely ass night. I didn't sleep, I couldn't eat. I thought we were on a better track, but now I'm right back into that state of loneliness and despair. I did not get married at first sight to go through this, go through these arguments, and get a divorce."

Amber, however, said Mia had told her that she left because Tristan had threatened to return to Houston. Amber and Dave didn't know which person to believe, as Tristan's story was obviously different.

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Tristan acknowledged he must pick up the pieces and lean on his family and God for support.

"I'm pretty sure this is the final straw for our marriage," Tristan noted.

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