LOS ANGELES, July 3 -- When Ashley Tisdale published an essay in January about being expelled from a celebrity mom group, she did not expect Hilary Duff's husband to call her out publicly, or Mandy Moore to wade in, or the resulting firestorm to follow her across social media for weeks. She certainly did not expect it to become a Netflix series.

But it has. The streamer is developing "Toxic Moms" as a half-hour dark comedy, with Tisdale and comedian Ali Wong both attached as executive producers. Sabrina Jalees, a writer on the sharp-edged "Search Party," is set to write and executive produce, The Hollywood Reporter reported Wednesday. The show does not yet have a cast, a director, or a premiere window. Netflix declined to clarify whether...