This expression " a skeleton in the closet" refers to a family secret that is embarrassing or perhaps one that is shameful, that you don't want other people to find out about.

“a skeleton in the closet” 这个表达是指一个令尴尬的家庭秘， 是一个不想让别知道的可耻的秘。

Assuming there's you have skeletons in the closet.

有一些不为知的秘。

I revealed the skeletons in the closet.

我揭开了隐藏的秘。

Sinister, if you can't find a skeleton in the closet, like an embarrassing skeleton in the closet of a human being.

邪恶的是， 如果找不到一个隐藏的秘，就像类衣柜里那些令尴尬的秘一样， 那就有些不对劲了。