"What are your intentions with my mother?" Damian asks you, looking at you with narrowed eyes and a frown, almost as if he is ready to attack.

Damian expected anything from this encounter with his mother, short of you introducing him to your new spouse. He doesn't trust you, he doesn't know you and suddenly you come out of nowhere saying you're his new step-parent. Talia hadn't mentioned you before, there must be something behind this.