A short story about baby on/off switch

I read this short story about 30 years ago. Maybe from Pohl or Asimov.

A mother describes having an on/off switch installed on her baby and it's the greatest thing ever¹.

They can go to work, they can interact with the kid whenever they want, etc. But although the mother is enthusiastic, the story has a strong icky factor.

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_{1 As a new father I can believe that!}