Intially Macbeth was felt reluctant towards killing King Duncan, but once they both agree they plan a few things. Following the initial plan set out by Macbeth to 'seem like the innocent flower but be the serpent' [underneath], Macbeth is to commit the regicide (murder) whereas Lady Macbeth smears the drunken servants to frame them of the killing. She refuses to do the murder as 'he resemble [her] father as he slept'.
I am aware this is considerably late, but i'm fishing for points here.
Thank you love