harsh language would weaken your position

none of your business，私下里一对一说可以，反正死无对证。公开场合说，有点儿泼妇骂街，反过来伤了自己。
相对棉里藏针，还有一个笑里藏刀的说法：
I have children -- it's my business, and mine alone. I would appreciate it if you could leave it to me.
这比上一句更加严厉。