90 Day: Darcey Arrives to Take Part in ‘Deep Therapy’ with Twin Stacey and Her Husband Florian amid Marital Troubles (Exclusive)

Darcey Silva has arrived at the 90 Day couple’s retreat as her twin sister Stacey tries to repair her relationship with husband Florian.

In PEOPLE’s exclusive clip from the Monday, Feb. 17 episode of 90 Day: The Last Resort, Stacey announces Darcey’s arrival during a dinner with Florian and the other couples on the retreat.

Stacey’s castmates react with both shock and excitement, but Stacey does not seem nearly as thrilled about linking up with her sister. Earlier in the season, Florian revealed to Stacey that Darcey once told him he was “better off single” than married to her twin.

“We need deep therapy between the three of us,” Stacey explains, gesturing to Florian.

In fact, Darcey is on her way to join the couples for dinner. “It’ll be the fun Darcey tonight, I’m sure,” Stacey quips.

In a confessional, Stacey says she is “happy” that Darcey is joining her and Florian at the retreat, but also nervous about butting heads with her twin.

Ultimately, Stacey wants her relationships “to change for the better,” and hopes therapy will help accomplish that goal.

“At the end of day, I’m here to work on my relationship with Florian and do the best I can for myself and my relationship,” Stacey says. “I mean, if that means having her here, great.”

One of the biggest strains on Stacey and Florian’s marriage has been Florian’s friendship with Darcey.

“It’s such a weird dynamic you have to experience for yourself,” Stacey tells the group after Florian suggests Darcey treats him like a brother.

Stacey even recalls a time when Darcey called Florian at 3 a.m. to chat. Florian says Darcey told him during the call, “Stacey’s boring. [My husband] Georgie is boring. Come here, have fun with me!”

But Stacey does not take kindly to being called “boring,” rolling her eyes at the thought. “Really? Whatever.”

As tension climbs, Jasmine tells Stacey she is “glad” that Darcey is joining the retreat.

“You need therapy!” she exclaims before telling Florian, “You behave now that Darcey is here.”

Florian chuckles and shakes his head as Stacey agrees.