marital relations; relationship between husband and wife
Refers to the state of the relationship between a married couple, often used in contexts discussing harmony or discord.
Lately, our marital relationship hasn't been going well.
Those two have been married for ten years, but their relationship as a couple is very good.
Compound of 夫婦 (ふうふ, 'married couple') and 仲 (なか, 'relationship').