A Text from My Husband

Earlier today, my husband, Macbeth, sent me a text message about something these witches told him about his future.  They said that he would be King. Oh, what I would give to be King... I would give up a child if I had one if it meant that I could be King.  My husband is not very powerful though, so I need to make sure he doesn't mess this up.  We need to get King Duncan out of the way though, he's blocking us from having power.  If I were a man I could kill him.  I could stab him with no problem.  Now I just need to give my husband that confidence because this needs to happen.  As soon as we get Duncan out of the way we'll be in a perfect position to rule.