Could a bundle of joy lead to the breaking point? Married at First Sight's Lillian Vilchez walks out on Tom Wilson after their fight over having kids in the Tuesday, September 13, episode, as seen in Us Weekly's exclusive first look.

The FYI unscripted series' preview clip shows Wilson revealing that his wife hasn't been returning his calls. The pair had previously shared a ton of chemistry but got into a heated argument in last week's episode when he told her it was too soon for them to consider starting a family.

"I woke up this morning to take out the dogs, and when I got back, Lily was gone," Wilson tells the camera. "Where's Lillian? I don't know where she's at. I sent her a bunch of text messages, I called her a bunch of times."

"We kind of had a rocky past couple days," he continues. "But I thought we were in a good place, so I don't really know what's going on."

The clip shows Vilchez returning home but slipping into the bathroom without saying anything to her husband. Wilson tells her through the door that they need to talk, and she agrees.

"The reason that I got married was to find somebody that I can be happy with for the rest of my life, and I think that Lillian could be that person, but we're still getting to know each other," Wilson says to the camera. "I'm going to try everything I can to make this happen, even if it's difficult. And I'm worried that there's something serious going on. I would be devastated if our marriage is in trouble."

Watch the tense clip in the video above. Married at First Sight, produced by Kinetic Content, airs on FYI Tuesdays at 8:30 p.m. ET.

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