[Angus completely deflates. She's right about one thing. It is entirely unpleasant to hear. It's not completely unlike some of what he's heard from others who have tried to discredit him in the past. Mostly people who he's revealed things about that didn't much appreciate it.

He sits back in his chair, and looks away from Toriel.]

She didn't make me do anything. I chose to do it myself!

[Now that he's raised his voice once, he can't help it. He just continues to get angry.]

Just because I'm younger than others doesn't mean I can't be trusted to do what I want to do! I never take on dangerous jobs without protection, and I'm doing the same thing adult detectives do anyway! Why can they do it and not me!?

[He grips the seat of his chair. He's literally just throwing a tantrum at this point, honestly. But, well. That's this event, I guess.]

No wonder you want to be my mom! You just want to take over my life!