I know about the secret wedding. I want Romeo and Juliet dead or else you both will die.
No, are you crazy! If we do that, Lord Capulet will kill us!
Let us just kill Lady Capulet
Let's kill Romeo and Juliet. And I have a plan.
You go to Juliet and tell her that you have a plan to stop the marriage against Paris. You give her a sleeping potion and tell her to write a letter for Romeo explaining the situation.
When you receive the letter, burn it. So it looks like it never reached Romeo and it won't be blamed on us. And then Romeo will either run away or kill himself! When he runs away, we will stab him on the heart.
Thats a perfect idea, let's get going with the plan