Short answer
Couples can protect quality time by establishing reasonable boundaries, reducing unnecessary interruptions and deliberately making time for their relationship.
Islamic Guidance
What Islam teaches
Marriage involves a private relationship between spouses. Islam also teaches respect for privacy and appropriate boundaries.
Practical Guidance
What you can consider
Agree on reasonable privacy boundaries, schedule couple time and avoid sharing private marital matters with others unnecessarily.
Sources
Qur'an 24:27; Qur'an 30:21.