Scott Disick appeared to say that his children were "upset" to have not been involved in a proposal party for their mother Kourtney Kardashian and her fiancé Travis Barker.
The proposal is set to feature in next week's episode of The Kardashians, with a preview having suggested that Scott and his children felt left out over the engagement last year.
It sees the Kardashian-Jenner family getting excited about Travis, 46, proposing to Kourtney, 43, amid a party for them, before cutting to Khloé Kardashian, 37, saying: "Scott knows."
She is later shown in a scene with Scott, in which they seemingly discuss the engagement in October, hinting that his children were not included in the celebrations.
Khloé asks Scott - who shares his three children Mason, 12, Penelope, nine, and Reign, seven, with ex Kourtney - in the preview clip: "How do they feel about everything?"
He responds: "They were upset. They didn't understand why they weren't there. Hopefully they're invited to the wedding." He then proceeds to ask: "Am I invited to the wedding?"
Khloé - who is the younger sister of Kourtney and Kim Kardashian, 41 - explains to Scott that she doesn't know if he will be a guest at her eldest sister's upcoming wedding.
The Mirror approached reps of Travis, Scott and the Kardashian family for comment on the preview.
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Scott and Kourtney dated sporadically between 2005 and 2015. Having since ended their romantic relationship, the former couple now co-parent their three children together.
She is understood to have began her relationship with musician Travis - who is best known for being the drummer for band rock band Blink-182 - towards the start of last year.
He proposed to Kourtney in October last year, with him having got down on one knee in front of her at a beachside hotel in Montecito, surrounded by red roses and candles.
The pair had an unofficial wedding in Las Vegas earlier this month following their attendance at the Grammy Awards. It however wasn't legally binding, as confirmed by Kourtney.
The Kardashians premiered on Hulu earlier this month in the US. It's said to have been a ratings success, with the new reality show broadcast internationally on Disney+.
The fourth episode - set to show the Kardashian-Jenner family in the build-up to the proposal - will be released on the streaming platform next Thursday (May 5) in the UK.
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