“Sister Wives”' Robyn Broke Down in Tears When Kody and Meri Officially Ended Their Marriage in Front of Her

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"I wanted to sit on a porch with my sister wives," Robyn says through tears and a shaky voice in a preview for next week's episode

<p>Ethan Miller/Getty</p> (L-R) Robyn Brown, Meri Brown, Kody Brown are pictured t the grand opening of Mike Tyson

Ethan Miller/Getty

(L-R) Robyn Brown, Meri Brown, Kody Brown are pictured t the grand opening of Mike Tyson's one-man show 'Mike Tyson: Undisputed Truth - Live on Stage' at the Hollywood Theatre at the MGM Grand Hotel/Casino April 14, 2012 in Las Vegas, Nevada.

No one took Meri and Kody Brown's separation harder than Robyn Brown.

In a sneak peek at next week's episode of Sister Wives, shown after Sunday's episode, the OG Brown family couple reached a major conclusion: they're ready to end their marriage.

As Robyn, 45, is ready to "advocate" on Meri's behalf to save her marriage from further crumbling, Meri notes in a confessional: "I'm not going to apologize for what I need to do."

In the next scene, Meri looks upset as her head remains down while Kody, 54, speaks to her about their future. "You want something that we can't have together," the Brown family patriarch says.

<p>TLC</p> Meri Brown on 'Sister Wives'.

TLC

Meri Brown on 'Sister Wives'.

Related: Sister Wives' Kody Told Meri on Their Anniversary He Has 'No Desire' to Be with Her: 'Never Going to Happen'

This declaration leaves Robyn — who was also present for the conversation — distraught, resulting in her breaking down in tears. Kody understands why his fourth wife is so upset, noting to the cameras that Robyn entered the family "specifically to live plural marriage."

"I wanted to sit on a porch with my sister wives," Robyn says through tears and a shaky voice.

<p>TLC</p> (L-R) Meri Brown and Robyn Brown on 'Sister Wives'.

TLC

(L-R) Meri Brown and Robyn Brown on 'Sister Wives'.

Kody then notes that "this appears to be the end of our plural marriage." After, the final shot shows a close-up shot of Meri and Robyn holding hands.

The sneak peek also sees Janelle Brown speaking with Christine Brown's brothers about her own future in polygamy, noting that they "were raised in a culture where marriage is forever." But she notes separately to the cameras: "I'm still spiritually married to Kody. Like, I don't know how to get a divorce that way."

<p>TLC</p> Robyn Brown on 'Sister Wives'

TLC

Robyn Brown on 'Sister Wives'

Kody's marriages to Christine, 51, Janelle, 54, and Meri, 52, all crumbled within 14 months. He now is living monogamously with Robyn.

As season 18 of Sister Wives has progressed, fans have been able to witness the breakdown of his three marriages and how he's moved forward solo with Robyn. It has also featured aspects of Kody's complicated relationships with his children, including his estrangement from his sons with Janelle.

Related: Sister Wives' Robyn Brown Says Life with Kody Has Been 'Hell' at Times amid Splits but 'He's Doing His Best' (Exclusive)

When it comes to his marriage to Meri, in particular, the pair — who confirmed their split in January after 32 years of marriage — have faced challenges for the last several years. Their marriage failed to recover after Meri was catfished by a woman posing as a male admirer.

It was on their 32nd wedding anniversary celebration that Kody then declared he had "no desire" to "have a relationship" with Meri, leading the mother of one to contemplate her next steps.

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Sister Wives airs Sundays at 10 p.m. ET on TLC.

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