A:
I have heard that your wife Mrs. Jiang is very serious as a teacher, so I send my child to her. 

听说你的妻子蒋老师很严厉,就把孩子放到她的班里去了。
B:
Too serious is not good. 

太严厉了也不好的。
A:
That is necessary, nowadays naughty kids are all spoiled. 

这是应该的,现在顽皮的孩子都被惯坏了。
B:
My son and I are naughty as well. 

我和儿子也很顽皮哦。
A:
I have attended a lecture by Mrs. Jiang, she would add “Is that clear” after each sentence. 

我听过蒋老师的课,每讨论一个问题都会加一句“懂了吗?”
B:
I really fed up with this matter. 

关于这一点,我真是受够了。
A:
Why do you say so? She is very serious. 

为什么这么说?她很认真的。
B:
And if I had thought about intimacy, she would say “Go turn off the light firstly, is that clear?” 

比如我们亲热的时候,她也说:“关上灯再来,懂了吗?”