Stacey Silva stands at a crossroads in her marriage with Florian Sukaj. After his past "cheating scandal," she is determined to let bygones be bygones and work on rebuilding their trust. In PEOPLE's exclusive preview of the Dec. 9 episode of 90 Day Fiancé: The Last Resort, a significant moment unfolds as Stacey picks up a rock inscribed with the word trust.

Trust: The Foundation of Their Relationship

"Choosing trust was a crucial step for Stacey. As she tells her husband, they have been grappling with trust issues since he came to America and the cheating scandal came to light," explains a relationship expert. "It was a painful and hard-to-forget event that has left a lasting impact on their marriage."Stacey continues, "I don't want to constantly worry about him being with other girls or having side chicks. I want to be able to trust him and grow old with him. We used to be so close, and I feel like we lost that connection."

The Impact of the Cheating Scandal

The cheating scandal, which was documented on season 1 of Darcey & Stacey, has been a constant source of tension between Stacey and Florian. "It was a betrayal that shook their foundation," says a close friend. "Stacey has been struggling to come to terms with it and find a way to move forward."During a heated conversation, Stacey breaks down in tears, sharing her desire to get back to the way they used to be. "I miss that closeness and connection we had," she says.

Working on the Relationship at the Retreat

At the 90 Day: The Last Resort retreat, Stacey and Florian are faced with the challenge of working together to heal their relationship. "They came here with the hope of mending their bond," says a therapist. "But it's not an easy journey."Florian tries to console his wife, reminding her that they are here to work on their relationship. However, Stacey is inconsolable, expressing her need for help in trusting him again.

Stacey's Struggles and Outbursts

After noticing Florian going out more after her emergency kidney surgery, Stacey's trust issues resurfaced. "It was a difficult time for her, and she found it hard to trust him again," says a family member.During a tense conversation, Stacey's emotions reach a breaking point. She snaps at Florian, expressing her frustration and pain. "I don't want this burden of doubt anymore. I need him to prove that he can be trusted," she says.Florian is left flabbergasted by his wife's outburst, but it is a clear indication of the depth of her struggles.90 Day: The Last Resort airs Mondays at 8 p.m. ET on TLC.