Lady Macbeth's decision not to kill King Duncan herself reveals that while she is ambitious and manipulative, she also has limits to her own moral corruption. She may be willing to plan the murder and encourage Macbeth to commit it, but she lacks the actual capacity to carry out the violent deed herself. This demonstrates a complexity in her character, showcasing her manipulation and ambition alongside a conscience that still holds some sway over her actions.
That she has a softer side, although she rarely shows it
He killed stewart and Duncan to get the throne
You'll have to rephrase this question, I'm afraid. Macbeth doesn't require Duncan to do anything. Duncan is the king, remember.
Macbeth is King Duncan's cousin as well as a general of the king. Later into the play, he becomes king.
Duncan is his cousin. Duncan is his king. Duncan is his guest. If he murders Duncan, he invites others to murder him. Many people like Duncan for being a nice guy and will be angry when he is killed.
duncan the king of scotland
Macbeth kills Duncan in his own castle at night time.
She causes it. He would never have murdered Duncan if she hadn't pushed him to it.
He is complex, with both good and bad qualities.
How long does duncan plan to stay at macbeths castle
Lady Macbeth isn't anxious to have Duncan at Dunsinane. Dunsinane is the palatial residence where the Macbeths live after they are crowned King and Queen of the Scots. King Duncan is killed at the previous residence of the Macbeths, at Inverness. And the murder of the King is exactly why the Lady seeks, and then delights in, his presence in her home [Act 2 Scenes 5-7].
Lady M is all for it but Macbeth is unsure and has to be pushed into doing it. He then immediately regrets it.