harsh language would weaken your position

none of your business，私下裏一對一說可以，反正死無對證。公開場合說，有點兒潑婦罵街，反過來傷了自己。
相對棉裏藏針，還有一個笑裏藏刀的說法：
I have children -- it's my business, and mine alone. I would appreciate it if you could leave it to me.
這比上一句更加嚴厲。