Possible Clues:

• A sign of something wrong in family member? Rest is the answer
• Maybe wife grabs a kiss lying in bed?
• Chilling out
• (Period of) rest
• New axle ratio enables a lessening of strain
• One of the family included a kiss, as a result there is less tension
• In physics, the return of a system towards equilibrium
• Family member welcomes a vote for rest
• One of the family with a cross to bear needs repose
• Bank reduced levies, avoiding initial easing