sister-in-law

n. /ˈsɪs.tɚ.ɪn.lɑː/ B2

嫂子；弟媳；大姨子

The sister of your spouse, or the wife of your brother.

仙境例句

The Duchess's sister-in-law came to visit, sneezed ten times, and went straight home.

公爵夫人的小姑子来串门，打了十个喷嚏，就直接回家了。