what incidents are revisited in lady m's sleepwalking scene ?

There is the blood on her hands, from Duncan's murder, that she can't wash off, Out, damned spot! Out, I say!

She had once told Macbeth that they will never be found out, none can call our power to account?

Duncan's dead body, Yet who would have thought the old man to have had so much blood in him.

The slaughter of the Macduff castle, The thane of Fife had a wife. Where is she now?