通い妻

かよいづま

noun

•

wife who lives elsewhere but regularly visits her husband

通	traffic, pass through, avenue, commute, counter for letters, notes, documents, etc.
妻	wife, spouse

かよづま

なまえ

とお

、

つま

おっと

もと

かよ

けっこん

けいたい

こと

A 'commuting wife' is just what the name says, it's a form of marriage where the wife travels to her husband's side