Waliyha Malik and Zayn Malik.Photo: Waliyha Malik/Instagram

Waliyha Malik and Zayn Malik

The singer’s sister Waliyha Malik offered her support for her older sibling on her Instagram Story, after Malik, 28, wasinvolved in a fight with Yolanda, although he denied ever hitting his ex’s mother.

She also shared a quote that declared “karma comes after everyone eventually.”

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“You can’t get away with screwing people over your whole life, I don’t care who you are. What goes around comes around. That’s how it works. Sooner or later the universe will serve you the revenge that you deserve,” the quote read.

Waliyha Malik/Instagram

Waliyha Malik and Zayn Malik

Waliyha Malik and Zayn Malik

Waliyha later shared another post about powering through situations that test you, as well as a quote from her brother’s 2016 memoirZayn, to which she added three red hearts.

“I was always brought up to respect women,” the quote read. “Both my parents instilled that in me, and in my experience women have been the most intelligent, peaceful and positive influences in my life.”

Waliyha Malik and Zayn Malik

Though the “Pillowtalk” singer has “adamantly den[ied] striking” Yolanda, he allegedly hurled a series of insults and “continuous cursing” her way, including telling her to “stay away from [his] f—ing daughter.” He and Gigi, 26, whosplit about a month ago, according to multiple sources, share 13-month-olddaughter Khai.

A friend of the former One Direction member told PEOPLE that Malik hasinsisted he never hit Yolanda, and the fight began when “she came over uninvited while Gigi was away for work and he was taking care of Khai … That led to an argument.”

While a family friend close to Gigi told PEOPLE that Yolanda “has had some issues with Zayn” and believes “he could treat Gigi better,” a Malik source told PEOPLE that despite the breakup, the former couple is “not fighting.”

“It was a super toxic relationship,” said a Malik friend.

RELATED VIDEO:Gigi Hadidand Zayn Malik Break Up After Singer’s Alleged Argument with Her Mom Yolanda: Sources

“Zayn’s an amazing dad, and Gigi has said so,” the source said. “They are actively and amicably working to find the best way to co-parent now. Yolanda is inserting herself into a situation that does not involve her.”

Malik alluded to the incident in a statement shared to Twitter Tuesday, writing that he wanted to create “a place where private family matters aren’t thrown on the world stage for all to poke and pick apart,” adding that the incident “was and still should be a private matter.”

Multiple sources confirmed to PEOPLE that Malik was referencing Yolanda in the statement.

Shortly after, a rep for Gigitold PEOPLE in a statementthat the star “is solely focused on the best for Khai. She asks for privacy during this time.”

Reps for Malik and Yolanda have not responded to multiple requests for comment.

source: people.com