In the Peacock mystery thriller series “All Her Fault,” Marissa Irvine (Sarah Snook) lives every mom’s nightmare.

Marissa goes to pick up her 5-year-old son, Milo (Duke McCloud), from a playdate only to find that he’s not thee. Things get stranger as Marissa learns that the text she received from another mom, Jenny Kaminski (Dakota Fanning), setting up the playdate was a fake. Jenny’s nanny, Carrie Finch (Sophia Lillis), grew close to Milo’s nanny, Ana (Kartiah Vergara), and developed a plan to kidnap him.

“All Her Fault,” which premiered on Nov. 6, is based on Andrea Mara’s 2021 novel of the same name. While it’s not a true story, Mara did get the idea for the book from a real experience she had.

“The book was based on a real-life event whereby I went to collect my daughter from a play

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