Dear Geetu,
According to your question,
For Peace in family specially between husband &Wife you should keep in mind following points:
Keep your bedroom in the south-west of the house.
Avoid bedroom in south-east as this is a fire place. It may lead to the clashes between the couple. .
Keep head-side of the bed in south direction.
For more details read article
Use wooden bed instead of metal bed.
Always build square or rectangle bedrooms which bring peace and love in life.
Paint walls in light colors like green, light blue, rose pink. Avoid red color in bedroom.
For more details browse link given below:
http://www.gharexpert.com/articles/Vastu-Shastra-1685/Vastu-Tips-Happy-Married-Life_0.aspx
Regards:
Priyanka sharma