Well, I know what they meant, but here is what the Huffington Post said about Cat Cora, whose wife Jennifer just gave birth to their third child (and who is herself expecting their fourth child):
It’s a case of trying to fit too much information into a brief paragraph. Despite what it sounds like, Cat and Jennifer did not both give birth to one of their two older children, they each gave birth to one of the older children. They also did not become pregnant at the same time with babies three and four, they each became pregnant with a baby at the same time.
As if pregnancy and childbirth weren’t already hard enough.