LOS ANGELES — In a development experts warn could send shockwaves through the nation’s mimosa supply, Hollywood’s most exclusive mom group detonated into public chaos Monday after Ashley Tisdale published a tell-all essay, sparking a high-profile feud with Hilary Duff’s husband, Matthew Koma, and several legacy Disney Channel personalities.

Eyewitnesses report that Tisdale’s essay, titled “Motherhood, Manicures, and Maximum Security: My Life in The Group,” accused fellow celebrity moms of ‘toxic positivity, gluten bombing, and weaponized Pinterest boards.’ An anonymous source close to the situation revealed, “It started with a heated debate about organic apple sauce pouches, and then Ashley called out Vanessa Hudgens for bringing non-artisanal play-dough. Suddenly, the group chat had more drama than High School Musical 2.”

Tisdale’s public airing of grievances prompted Koma to respond on Instagram Live, saying, “I didn’t sign up for this. I just wanted to pick up my kid without passing through three ring lights and a confessional booth.” Adding fuel to the fire, former group member Brenda Song told reporters, “I left after someone replaced my son’s gluten-free snacks with what I can only describe as Doritos dust. No mother should suffer that betrayal.”

Meanwhile, industry insiders warn the feud could dramatically impact brunch reservations in West Hollywood through at least mid-June. “I’ve never seen anything like it,” says local restaurateur Hans O’Malley. “We’re bracing for a run on bottomless mimosas, and have established a velvet rope around the avocado toast vault.”

At press time, Tisdale was seen forming a rival mom group called “The Real Disney Moms of Beverly Hills,” already accepting applications from anyone without a gluten allergy.