4. Carlos: "It's driving me crazy, mama. It could be any one of these guys she's having the affair with."
Mama Solis: "Don't worry about it. I'm not letting her out of my sight."

Drive sb crazy:使某人发疯 have the affair with sb:和某人有一腿 affair在DH中经常出现，就是我们说的外遇啊，婚外情，绯文等等。Out of sb sight:离开某人的视线。

5. Lynette: "I'm not surprised that he's playing it close to the vest. Paul knows we're on to him."

Close to the vest 有很多异体形式， "playing/keeping it close to the/your vest/chest", 但最早它从一个更长地短语演变而来 "playing your cards close to the vest"。
这些短语从字面上看就是"把自己手上的牌紧紧地拿在胸口，以防别人偷看"的意思。把牌紧紧地拿在胸口防止他人偷看，就是为了使别人不能从战术上占便宜，所以在游戏中，你会小心翼翼，不让你的对手和他可能的同伙站在你的身后。而这个短语的隐喻用法则是其本意的自然延伸。
如果说某人 play it close to the vest/chest，也就说这个人非常小心，谨慎甚至诡秘的策划什么行动，而且最重要的是隐藏自己的意图及相关信息。
牛津英文字典用它来描述神秘的行为，请看原文例句：
I couldn't afford to give hints...You have to play these things close to your chest.
Close to the vest用在一般情况下就是指一个人非常小心不让别人知道他在干什么

来源:可可英语 //www.utensil-race.com/video/200904/18351.shtml