She's told him, over and over, that it's not his fault she struggles with surrender, that her emotional issues are hers alone. He believes her, but he's going to have to break through them today or else he'll just exhaust her with no end in sight. Draco keeps that to himself, though. Hermione Granger is the poster child for the phrase 'psyching oneself out.' Or, the one where Hermione can't stop orgasming, so Daddy Draco has to fuck it out of her.