'Sister Wives' star Christine Brown reunites with Janelle Brown for off-roading adventure

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Christine Brown and her fiancé David Woolley just took Janelle Brown on a wild adventure.

The former sister wives reunited in Christine's new home state of Utah over the weekend and went off-roading together in a RZR vehicle. Naturally, hilarity quickly ensued and Christine shared a video of their bumpy ride in Moab.

"We went RZR riding with a couple special guests this weekend!" Christine captioned the post.

The clip begins with Janelle saying, "Oh my gosh!" as she holds onto the hand bars tightly. Savanah Brown, one of Janelle's daughters with Kody Brown, also tagged along for the adventure and sits in the back seat with her mother in the video.

Janelle wasn't prepared for the steep incline that comes next and her reaction leaves Christine, Savanah and David laughing.

“I can’t believe that was vertical. We seriously went vertical,” she says.

Meanwhile, Christine seems to be right at home as her future husband guides the group around like a pro.

"OK, now we're going up that," David says, the camera panning to a big hill.

"That almost scares me more," Janelle replies.

David chimes in again, teasing Janelle a bit. "Wait until you get to the bottom and you look up and you’re like, 'Oh crap!'" he says, concluding the video.