Aiden's eyebrows shoot up when he realized from where Mila got her assumptions. He scolded himself internally, how can he be so careless? He was lost in Sarah's voice and totally neglected that there are other people in the room. He should have known better and pay more attention to his surroundings, but things are done, and he needs to focus on salvaging the situation.
Aiden wanted to deny Mila's accusations. How can Aiden be fond of Maksim, or the other way around, when the two of them hate each other's guts? Well, Maksim hates Aiden, and Aiden is only reciprocating in the same way.