Draco had to marry Potter to stay out of Azkaban. Narcissa told him he’d be safer there. But he doesn’t know what Potter expects from him - this marriage is nothing like he had been prepared for. Potter’s acting kindly, and he knows it’s all a trick. He’s just about coping, but trying to keep Potter happy becomes more important than ever when he realises he’s carrying the man’s child.
Draco had to marry Potter to stay out of Azkaban. Narcissa told him he’d be safer there. But he doesn’t know what Potter expects from him - this marriage is nothing like he had been prepared for. Potter’s acting kindly, and he knows it’s all a trick. He’s just about coping, but trying to keep Potter happy becomes more important than ever when he realises he’s carrying the man’s child.