"I was a good person once", he murmurs, his voice heavy with the constant burden of guilt and regret.
What she should say is 'You're a good person NOW'. But she knows that he'll never believe her words, even if they are the truth.
Instead she whispers "I know" into the darkness. His hand on her belly tightens almost imperceptively and she covers it with her own, lacing her fingers with his.