7. How can I use this to get Nate off the hook?

off the hook: 从某个困境中解放出来，这个说法来自于形容鱼脱离鱼钩，引申的含义就表示逃离困境、责难等不好的情况。另外，the phone is off the hook，表示电话没有挂好。

8. Hooking up with your dad's second wife? I thought my family was twisted, but you people take the cake.

hook up with:
这里指have sex，不过当它表示这个意思的时候，你hook up的对象，通常不是你的恋人或者爱人，就比如Catherine和Marcus这种的。hook up还可以指make out（亲热）或者hang out（外出约会）。总之两个人搞在一起了，就可以用hook up.
take the cake: to be the winner. 以前美国南部的奴隶主会举行一种叫做cakewalking的比赛，参加比赛的都是黑奴，步态优美者就能获得一块蛋糕作为奖励。

9. - It's only happened a few times, and I put a stop to it when I met you.
- I really opened myself up to you.
- Can't... can't we still...
- Oh, please. I just want to get through this without throwing up in my mouth.

open myself up to you: 我向你敞开了心扉
throw up: “吐”在口语中最常用的就是throw up和puke了，至于vomit，是医学上的讲法。

10. Catherine, whatever it is, just spare me. What do you mean? Vanessa talked to the duke? No, I told her to stay out of this.

spare me: give me a break, 放过我，饶了我，别来烦我了
stay out of this: 不要插手这件事情。