Happy are those who belong to families in which there is love, understanding, and peace. Hopefully, yours is such a family. Sad to say, countless of families fail to fit that description and are divided for one reason or another.
Most families got divided because of sharing different religion, not having the same biological parents while some family tear apart because the desire of having more material things.
What make the difference?
First try to understand other view point, if you sincerely try to understand the other person's point of view, you are more likely to discern how to preserve a United household.
A second factor is your source of guidance, many people allow outsiders to incroach in their family matters.
To many God's word has remain a light to their foot step and they apply what they learn.