Photo: Patrick McMullan/getty

BellaandGigi Hadid’s sisterly bond has become even stronger following the altercation that took place between their mom, Yolanda, and Gigi’s ex,Zayn Malik, a source close to the Hadid family tells PEOPLE.
Gigi Hadid, Yolanda Hadid, Bella Hadid.Bryan Bedder/Getty

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Adds the insider: “This has not been easy on Gigi and has caused a lot of stress on relationships with her family.”
Reps for the Hadid family did not immediately respond to PEOPLE’s request for comment.
RELATED VIDEO:Gigi Hadid’Has Made It Clear Her Daughter Needs Her Dad' Zayn Malik After Yolanda Argument: Source
In October, Malik responded to a report published to TMZ in which he allegedly struckYolandaduring an argument,writing in part on Twitter, “This was and still should be a private matter but it seems for now there is divisiveness and despite my efforts to restore us to a peaceful family environment that will allow for me to co-parent my daughter in a manner in which she deserves, this has been ‘leaked’ to the press.”
In astatement to the outlet, Malik “adamantly” denied striking her, saying: “I hope that Yolanda will reconsider her false allegations and move towards healing these family issues in private.”
Havingpleaded no contest to the charges, Malik is required to serve 90 days of probation for each of the four counts; he must also complete an anger management class and a domestic violence program and is barred from having contact with Yolanda or McMahon.
Gigi Hadid, Zayn Malik.Darren Gerrish/WireImage

Malik and Gigi, 26, sharedaughter Khai, 15 months, together.
Shortly following the alleged altercation between Malik and Yolanda, 57, Gigi and the former One Direction star ended their romantic relationship,multiple sources confirmed to PEOPLE in October. “They are not together right now. They are both good parents though,” said a Hadid family friend. “They co-parent. Yolanda is of course very protective of Gigi. She wants the best for her daughter and grandchild.”
source: people.com