Sparks flew the moment the two ladies exchanged words. They did have smile on their faces, but the cold gaze they both had was flashing with something that caused the people around them to shiver. They didn't have an single clue what was going on between the two people and how they should react in this situation.
Matilda didn't expect that Snow would be coming at her with such blatant and naked aggression. However, just when she was about to douse the latter with a cold bucket of water, the blonde asked, "I heard that Lady Luger had a terrible fall and her jaw broke as a result. To see that you have regained your ability to speak in such a small time, this is astonishing."
Snow surely knew where to stab to induce the maximum pain but not killing the prey. Leo didn't marry a vase, Snow was an equal to him if not more when it came to threat to enemy.