One thing about sleeping soundly, your mind has to be free from psychological strains such as relationship conflicts and problems. The mental aspect in people’s lives today bring a real bearing towards identifying how peaceful a person can be. Once there are issues or misunderstanding along the way, expect one or both to be thinking of remedies or an escape button out of it all.
Marriage is a sacred thing but it is also a two-way street. To get along, couples need to leave an open communication to sort out problems. Settling the conflict before going to bed is always advised. This holds the same for sleeping perfectly without anything to hinder you from snoozing away.
“Divorced individuals tend to have more sleep problems than those who are married; however, among the married, we know very little about how differences in marital quality may be linked with sleep,” said Dr. Wendy Troxel.
“The results show that happily married women have fewer sleep problems than unhappily married women.”
(Source) Telegraph.co.uk
A good article which co-relates the Sleep and Marriage.