When you build a house out of cards, you know that with each card you add the more difficult it becomes to keep it from crashing down. One slip of the hand, your house is destroyed in literally seconds! Not days, not hours or even minutes--SECONDS! Building a blended family is a lot like building a house of cards. You slowly build your family up one card at a time and just when you think; we finally made it! A card gets pulled out your house.