Jane said with a laugh, “My brother and I are twins, and I had twins too. It’s in our family genes. You can envy me all you want, but unfortunately, it can’t get you twins.

“Don't worry. In a few years, you can have a daughter of your own, and then you won’t need to envy me anymore.”

As Jane looked at the baby, she added, “Your little one is perfect too. No matter the gender, they’re all our little treasures.”

Nowadays, most families had only one or two children. With fewer kids in the equati