As a parent myself I can tell you that they are very likely referring to having two to three children close together rather than a single child ... ie. having both a six year old (eldest) and a child in diapers | stroller (youngest) at the same time.
After that period things are great!
. . . until you've faced with a household full of teenagers rebelling against anything and everything in overly dramatic ways.
After that period things are great!
. . . until you've faced with a household full of teenagers rebelling against anything and everything in overly dramatic ways.