过年时，婆婆向我介绍丈夫的姐姐，说她是我的大娘姊。
During the New Year holiday, my mother-in-law introduced my husband's elder sister and said she was my dàniángzǐ.
During the New Year holiday, my mother-in-law introduced my husband's elder sister and said she was my dàniángzǐ.