An episode full of bad decisions.

The cardinal Married at First Sight sin has been committed. On Tuesday night, two participants go on a date - behind their partners' backs! But let me pour myself a drink before I break this episode down from the beginning. I think we’re all going to need one.

Yes Week continues and one groom is drunk with power.

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NASSER & GAB

Nasser has forced Gab to clean the house while wearing a "short black dress with heels". She abides by his rules and gets to work. "It's very sexy, darling," he says, while Gab looks at him like she might murder him. He then has her change into a leopard-print dress and start vacuuming, which apparently is a male fantasy? The more you know.

Pray for Gab. Image: Nine

Nasser makes up for his power-mad behaviour by taking Gab to an acting class, which he knows she loves to do. And not a leopard-print dress in sight.

RYAN & DAVINA

Meanwhile, Ryan tells Davina that for Yes Week he's getting a tattoo. Of her. In a season packed with poor choices, this is maybe the gold medallist. Davina is stoked that Yes Week has been so easy. At the tattoo parlour, he gets a mermaid inked onto his arm with Davina's head and I feel like he's DEFINITELY going to regret it when he inevitably finds out she's been text-cheating on him.

No ragrets. Image: Nine

Then, Davina decides she wants to join in on the spontaneity. They get matching love heart tattoos. Ryan tells producers he can see a future with Davina. But Davina says, "It's not necessarily an 'I love you' tattoo. It's more like a 'Why not'."

She is absolutely leading him on, and it's horrible to watch. While in the parlour, she reveals to us that she's meeting up with Dean tomorrow.

JOHN & MELISSA

John and Melissa remain a WONDERFUL couple. John has control during Yes Week and arranges an adorable painting session in the park. They paint each other with hilarious results.

Worst painting I've ever seen in my whole life. It's Mel, by the way. You'd be forgiven for not knowing. Image: Nine

SEAN & JO

On the other hand, Sean and Jo continue to have a cringeworthy week. The pair have been forced to spend the next week together to try and sort out their relationship following Sean's decision to leave the experiment. (He didn't get to leave because Jo asked to stay.)

Jo has Sean cook her dinner. As usual, they barely utter a word to each other. In just two weeks, Jo and Sean have become one of those couples that have been together so long they have nothing more to say. It’s almost impressive.

Jo living this moment is how I feel watching this moment. Image: Nine

But then they joke about parmesan cheese and suddenly there's hope that, if not husband and wife, they'd make really good roommates one day. If we’ve learnt anything, it’s that parmesan is a force of pure good in the world.

TELV & SARAH

In Telv and Sarah's palace of romance, the two are cuddling in bed when Sarah grabs his phone (bad idea).

She flicks through his apps (bad idea).

She finds three dating apps on Telv's phone and asks him why he hasn't deleted them.

Trouble. Image: Nine

In fairness though, Telv is definitely not using these apps. He's clearly just lazy when it comes to cleaning out his apps, which I think we can all identify with. HE IS SMITTEN WITH SARAH, which I certainly identify with.

But Sarah has been cheated on in the past, so she's feeling anxious that one day Telv might turn to his apps if they have a bad day and he needs an ego boost.

Telv says he has so much respect for Sarah, and he doesn't blame her for being mad. He apologises to Sarah and says he had no idea that the apps were still on his phone.

As a way of apologising, Telv cooks Sarah one of her favourite dishes while wearing nothing but an apron.

Australia forgives you Telv. So does Sarah, whose only concern is the idea that he might "burn his noodle".

Burnt noodles are the WORST. Image: Nine

Telv hopes she's okay with his "dad bod".

PATRICK & CHARLENE

During Charlene and Patrick's Yes Week, Charlene asks Pat to give her a massage. She is horrified by his lack of skill. Did he not train in remedial massage therapy? What an outrage! He has to work on this, or there could be trouble.

This is apparently how Pat thinks a massage works. Image: Nine

MAT & ALYCIA

Mat and Alycia continue to give each other space by living in separate apartments. Alycia doesn't understand why things spiralled after their beautiful wedding, and she's upset after their big blowup the day before. Mat's still having doubts and says the more time they spend together, the less they have in common.

Mat asks Alycia to meet with her. He acknowledges that he's been making her life "hell". He says he doesn't see the point in continuing the experiment because he has his own issues he needs to sort out.

"I think it's in everyone's best interest that we leave the experiment," he says. "My heart is just not in this at all."

I'm not crying. You're crying. Image: Nine

RELATED: 'Married At First Sight' star Alycia: 'I don't know where the Mat that I married went'

"I've got nothing to say," Alycia says. "Sorry. I'm just really hurt."

Mat tells Alycia that he's not the guy for her. He leaves her heartbroken and in tears. They pack their things and leave the experiment forever. I also pack my things and leave because I AM DEVASTATED.

TROY & ASHLEY

Meanwhile, in Troy and Ashley land, Ashley is exasperated by her husband. While rock climbing for Yes Week, he says he's desperate to impress her, but she quite clearly hates everything about him and finds nothing impressive. I am genuinely surprised that she's still here. I'm wondering if there's some sort of bribery going on.

Ashley, why are you still in this marriage? Image: Nine

DEAN & TRACEY

Next door, Tracey (who rightfully has a vendetta against Dean) writes him a list of chores for Yes Week. He stills tells producers (and not Tracey) that he doesn't think his relationship with Tracey is going to work. He continues to text Davina ahead of their secret meeting.

Tracey catches up with Gab for drinks where she gushes about how committed and honest Dean has been acting since the last commitment ceremony. I know we all have more information than Tracey, but… come on, Tracey.

Tracey is 6000 x better than Dean. Image: Nine

And now we’re here - it’s time for the big meeting.

DEAN & DAVINA

Dean and Davina finally catch up at a bar to discuss how they both want to leave their partners. They wonder whether they'd be better suited if they were married to each other instead of Ryan and Tracey. The world nods in agreement.

And because they’re going for the terrible behaviour jackpot, they're hugely flirty and touchy the entire time. Dean tells her she looks hot while rubbing her leg. Davina says she's going to wear something ~sexy~ for him at the next commitment ceremony.

Gross. Image: Nine

They talk about how they "excite" each other and want to make out. I spit out my dinner and decide to never make out with anyone ever again. They tell each other they'll keep their relationship a secret until at least the next commitment ceremony and that they'll meet up again.

PLEASE DON'T.

They return to their apartments and lie to their partners about where they've been.

Next time, the couples attend their second dinner party, where Davina and Dean openly flirt with each other in front of EVERYONE.

Aine Ryan is an entertainment producer at 9TheFIX and 9Honey. Tweet her at @ainefryan about all things Married At First Sight, including your predictions!

Married At First Sight Season 5 continues Wednesday night on Nine. For more on MAFS, including behind-the-scenes clips, head to 9Now. Catch up on exclusive interviews at 9TheFIX. MAFS obsessed? Tune into 9Honey's weekly chat show, Talking Married, where you'll get the inside scoop on every episode.