Yahoo CEO Marissa Mayer’s tweet treat: Halloween photo of her son

Yahoo workers got a treat Tuesday when Chief Executive Marissa Mayer escorted her 1-month-old son, Macallister, to a kids’ Halloween party at the Sunnyvale, Calif., company called -- what else? -- YaBoo.

Mom and son wore matching chili pepper costumes. Mayer, Yahoo’s mom-in-chief, posted a picture of the pair on Twitter.

The 37-year-old Mayer returned to the office two weeks after her son was born and on the same day, Oct. 15, that she announced her new chief operating officer, former Google executive Henrique de Castro.

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