I sometimes get accidentally emotional about Petunia Dursley. When you watch her give her mini speech about how Lily was a witch, there seems to be a lot of forced conviction behind her disgust. She started off biting but then her resolve slightly weakened and the more she talked about Lily, and the closer she got to bringing up the fact that her sister was murdered, the more Petunia looked like she wanted to cry. But she couldn’t cry, not with Vernon around. How would it look to him if she admitted with her tears that she deeply missed her “freaky” sister?