June 06, 2016 09:20 AM

There’s tension brewing between Kris Jenner and one of her daughters on Keeping Up with the Kardashians.

In a preview of Sunday’s episode, Jenner gets into a discussion with Khloé Kardashian about her estranged husband Lamar Odom.

“I think Lamar needs us as a family,” Jenner, 60, tells Kardashian of the former NBA star, who is still recovering from a near-fatal overdose in October.

Kardashian, 31, appears frustrated.

“Lamar and I are not together!” she tells her mother before Jenner walks out of the room and Kardashian rolls her eyes, falling back onto the bed in exasperation.

In another scene, Kardashian then turns to sister Kourtney Kardashian, 37, for support.

“Why is Mom so on his side and never really mine?” she asks.

RELATED VIDEO: Kardashians Fear Lamar Odom Will Overdose Again After Drug Pipe Allegedly Found at His House

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Kardashian, while still legally wed to Odom, 36, is moving forward with their divorce, with a source recently telling PEOPLE: “Khloé cares about Lamar and he’ll always be in her life. But there is only so much you can do for a person. You can’t help or fix someone who won’t fix themselves.”

Another insider told PEOPLE on Friday that Odom might be taking a turn for the worse after being spotted drinking more than once in recent weeks.

“He is a sad mess,” said the insider, who added Odom’s friends allegedly “found a drug pipe at his house.”

According to the source, Kardashian and her family are worried Odom might relapse.

“His body is not back to normal and it never will be,” says the source. “There is a fear that he will again have an overdose.”

Keeping Up with the Kardashians airs Sundays (9 p.m. ET) on E!

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