The seven couples who had been married only a month were still in a «state of marital bliss» and were not open to looking in depth at their marriage. (religion-online.org)
But it is worth noting that similarity between romantic partners has been associated with greater relationship success, 7 and should the two have stayed together they may have found marital bliss. (scienceofrelationships.com)
That being said, there is no hard - and - fast rule to determine what size age gap is your safest bet for marital bliss. (health.com)