Christine Brownis standing her ground.

In PEOPLE’s exclusive sneak peek at Sunday’s episode ofSister Wives, Christine recalls a painful part of her marriage to husband Kody Brown — a season she says is the reason she doesn’t want to live under one roof as a plural family ever again.

“I’m not doing it again. I’m not going to put myself in the situation where my kids' needs aren’t met,” Christine, 48, says in a confessional. “I’m not going to do it.”

“Having a backdoor entrance, that was a really, really bad thing. I don’t feel like it was Kody’s house,” she says. “I had a backdoor entrance, so it’s like, Kody would come in, dump all of his stuff at Meri’s house or Janelle’s house — never settle in mine.”

Kody Brown and Christine Brown.Christine Brown/Instagram

Kody and Christine Brown

According to Christine, at the time, Kody, 52, never showered in her space — which became a point of contention.

Christine Brown.Christine Brown/Instagram

Christine Brown

Sister Wives

Remembering the earlier years of their plural marriage, Meri says the topic is something she’s never discussed with Christine. Still, “I know that she has a problem that he never showered at her house,” Meri tells the cameras. “Honestly, it was nothing that ever came from me. I never asked Kody to shower at my house. Like, I didn’t care where he showered.”

As for Kody, his recollection of the events is different. “Christine’s memory of our experience in Lehi was that I never showered at her house, which isn’t actually true. I showered at her house a lot,” he says in a confessional.

“I tended to shower more often at Meri’s house in the morning, because Meri would be going to work, I would visit with Meri,” he continues. “Then I would have breakfast every morning at Christine’s house before I went to work. And so I felt like I was balancing out something in the relationship.”

From Kody’s perspective, Christine “twists the past experiences that we’ve had to a negative place, and that’s the reason she’s not wanting to be in one home.”

“So it’s not about the one home thing — it’s about how she has twisted our past and made it negative,” he says.

Sister Wivesairs Sundays (10 p.m. ET) on TLC.

source: people.com