I have a question

Lilou's expression was dead as she sat down in the chair beside Law, who was sandwiched by his parents: Lilou on his right and Samael on the left. 

Samael glanced at them and instantly caught the coldness in her eyes. He quirked a brow in intrigued.

'Did something happen to her? Why is she angry?' he wondered, glancing at Law. Samael lowered his head and inquired to his son in a quiet voice.

"Is your mother alright?" he asked and Law glanced at Lilou. The latter shrugged. 

Just now, he and Lilou were alright. She would constantly smile at him and held his hand tenderly. But in a blink of an eye, Lilou completely turned into a different person. Law would be worried if not for Lilou, casting him a warm smile only to glare at Samael. 

Samael flinched after receiving the deadly glare his wife would usually give him when he did something wrong. Or even when he did nothing wrong.