mistress

n.情妇;(尤指私立学校的)女教师;(尤指旧时雇用仆人的)女主人，主妇

复数： mistresses

Does his wife know he has a mistress?

他的妻子知道他有一个情妇吗？

His concubine, mistress chen, was visiting with her old mother.

陈姨太也回到了她的年老的母亲那里。

Is your mistress at home?

你的女主人在家吗？