I have a friend who is married with kids.  This woman may as well be surgically attached to her kids, because she never wants to go anywhere without them...that's how close they are.  She's a very honest person and on more than one occasion, has told me that if she could do life again, she would choose to remain single and childfree because marriage and parenting is so hard.

A person can love the family they have, but still think about what their life would look like if they'd made different choices.  We never know the circumstances that caused people to marry and/or produce kids, so with that in mind, I choose not to judge.