Lady Macbeth will you please meet with me outside.
* random conversation *
* eating *
Lady Macbeth I simply can not kill I am his kingsmen and he is my king. Killing King Duncan will be a huge crime and I simply can not risk it.
Stop being a coward ! You already said you would do it and if you do not you cant even be considered a real man.
Fine I will go out with the plan but how do we plan to kill King Duncan?
We will get both of King Duncan's servants so drunk they will not be able to remember anything, then you will sneak past them and kill the king, and lastly place the knife on the servants so it looks like they killed the king.
* so drunk they do not even notice Macbeth walk by with a knife *