Answer: honeymooner
Step-by-step explanation:
Honeymooners are the couples that have recently married or appreciable time has past their marriage but do not have children. Such couples save and spend a lot of money for a couple trip or honeymoon. Such couples are either restricting pregnancy to enjoy or plan honeymoon to conceive a child as they get some personal space away from the family.
The given situation is indicative of the fact that Ken and Kira are honeymooners as they are saving money to go on a cruise they are planning.