Draco was torn between crying and laughing. If they had been face to face somehow, he would have hidden under the blankets from his wife.
He chose to laugh. He couldn't even bear to greet her.
But really, what would Draco Malfoy do if his wife was not so persistent? Despite how insane he thought she was, despite how much she made him sprout gray hairs, she honestly made him a better man.