See an exclusive clip from the finale here

By Lanford Beard
Updated January 06, 2015 02:15 PM
Credit: Brian Doben

As Bill Klein heads into surgery in the season finale of The Little Couple, both he and wife Jennifer Arnold struggle with the fallout of an incredibly emotional year.

In an exclusive clip obtained by PEOPLE, Arnold – who overcame a rare cancer last year – forces herself to stay steady as her husband, 40, prepares for a spine surgery that could potentially paralyze him.

“I think I’m just going to go into my survival mode,” says Arnold, 40, who dissolved into sobs during Klein’s previous surgery. “[Even though] inside, I felt like just losing my mind.”

“It’s almost like it’s too hard to cry,” she explains, “This year has been so much that I feel like I can’t even allow myself to break down. All you can do is just keep going until you can’t go anymore.”

The Little Couple wraps its seventh season Tuesday night at 9 p.m. ET on TLC.