Richard's character exposed

"Arise, dissembler: though I wish thy death, I will not be the executioner" (1.2.170-171). This quote is said by Lady Anne to Richard III after Richard confesses his "love" to her. He tells her to stab him and she decides not to. I think this is really highlighting and helping us to understand the character of Richard in comparison to the other characters in the play. It also helps us to see what kind of marriage Lady Anne is getting herself into, as well as what kind of character Lady Anne is herself.