Once I was Lady Macbeth

Were you devastated by my words?
I am surprised by my own capacity
For such efficient callousness,
My remarks like the lash stings,
Those words were bold things
That captured my naivety,
So that no apology can suffice,
Though I endlessly scrub
At the spot where my words
Stained you,
I am still not quite sure
Whether they tainted you
Or me more,
And even less certain
Of the motives for my regret,
But no room for compassion now
As my words lie fettered here,
Like detritus in this space,
Between us.