How many kids in your family?

Kids. Children. Offspring?

Nothing to differentiate between adult or non adult. How many kids in your family? How many kids do you have? What year was your child born? How many kids does your sister have? Is so-and-so your oldest child? I'm a middle child, are you the youngest child? He's an only child. There are three of us kids in our family.

If one were to insert grown or adult, as in "how many adult kids does your sister have?" it would suggest the sister has some non adult kids. Nobody ever says, "Is so-and-so your oldest adult/grown child?" or "I'm the middle adult child, are you the youngest grown child?".

People use the words kids and children all the time when referencing people's offspring or siblings. It's not meant to infantilize and as far as I can tell, normally doesn't.

Am I missing something? Is this subject a source of angst (Angst as in the English, German, Danish, Norwegian and Dutch word for fear, or anxiety) for everyone but me?