In a preview clip for this weekend's episode of Keeping Up With The Kardashians in the US, the momager can be seen expressing concern about Scott's drinking.
Ahead of her birthday bash, she tells her daughter's boyfriend: "You need to lay off the alcohol."
It appears that Scott, however, doesn't listen, as we later hear Kris lamenting that she "can't believe he got drunk" and seemingly branding Scott an "asshole."
Scott - who lives with Kris' eldest daughter Kourtney Kardashian - voluntarily entered a rehab facility in Costa Rica earlier this year, saying: "I realise my issues are bigger than me and I'm ready to truly remedy this struggle I continue to battle."
He did not specify what issues he was seeking help with.
Scott left the Rhythmia Life Advancement Centre after one week but has said he wants to return and continue treatment in the future.
He told People: "It helped my dramatically to see some of the things that have troubled me in the past, but I'm not done. I plan to go back and I hope it helps me even more to get to a point where I'm fully cured of some of things that I struggle with."
The star has three children with Kourtney: Mason, five, Penelope, two, and Reign, four months.
All you need to know about Kourtney Kardashian in just one minute:
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