The crocodile tears run blue

But are they sourced from her or from you?

The Nile doesn't flood

So much as this water full of mud

The truth is askew and one of you should have knew.

Version 2: 

The crocodile tears run blue

But are they sourced from her or from you?

The Nile doesn't flood

So much as this water full of mud.

Someone should have known the truth was askew. 

*Which last line do you like best? Do either one work?