Maintain what you want. You'll still be wrong. Just as the homosexuals who get some official to declare that what they have is a marriage are wrong.
It's like the old riddle: "If we call the tail a leg, how many legs does a dog have?" Answer: "Four. Calling a tail a leg doesn't make it so."
This needless hair-splitting leads to the absurd situation in which parents that tragically lose their only child get demoted to "childless couple." They're no longer a family?
They tragically become a couple who lost their child, but still have their marriage. Depending on your faith system, the family is either lost, or continues in another realm. Mine teaches that families are forever. Here's one back to you: if a childless married couple get divorced, do they still have a "family"? How about if they had children? If sibling children lose their parents, are they still a family? Can you divorce a brother or sister, a father or a mother? What do these answers tell you about the vital component of a family?
You're so intent on definitions, what about the parents who divorce after creating x number of children, ensuring constant handoffs and "visitations"? Are they more of a "family" than say, some of us childless couples who have been together happily for more than twenty years? :)
In response to this, they most certainly can. People can disown their children, siblings, etc.
I maintain that you are wrong, that my wife and I are family, and I am going to leave it at that without any monkey business such as equivocating you and your wife homosexuals. Good day.