Yep, my DH did exactly that. I was uber paranoid after a M/C with first pregnancy so didn't want to tell anyone until at least 12 weeks.
At about 11 weeks I was on the phone to a friend who congratulated me on my pregnancy. When I asked how he knew, he replied that he had overhead another mutual friend that DH had told talking about it at the only place to get coffee in the building. Useless.
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