noun
one's younger sister and her husband
Refers to the couple consisting of one's own younger sister and her spouse. Used in family contexts.
妹夫婦が来月、新居に引っ越すそうだ。
I hear my younger sister and her husband are moving to a new place next month.
先週、妹夫婦と一
Last week, I had dinner with my younger sister and her husband.