她的嫂子烤的饼干非常好吃。

Her ___sister-in-law bakes amazing cookies.

我和我的嫂子为我哥哥计划了一个惊喜派对。

My ___sister-in-law and I planned a surprise party for my brother.

在婚礼上，我第一次见到了我丈夫的嫂子。

At the wedding, I met my husband's ___sister-in-law for the first time.