My favorite part of this scene is that Maggie literally cannot contain her admiration over Alex, even when she is upset. If you look really close, the only time Maggie is showing her full genuine smile is when Alex is looking down. As soon as Alex looks back up, Maggie tries to hide it. She attempts to hide her smile because she wants Alex to understand the seriousness of their conversation. There are other instances where Maggie shows microexpressions of happiness/joy/understanding/love in this scene as well.