The only trouble he can really cause with us is a little aggravation, so don't worry about it.

[He shrugs; he doesn't want to make a big deal about it, even if there's still a bit of underlying irritation; he hasn't forgiven Robin for trying to interrogate Teddy, and he knows that he's apparently not trusted for his magic - and for his association with Loki. At this point he doesn't really give a damn what Robin thinks about Loki coming over like this.

Back to what he was saying, though...]

...I'm one of them- a mutant. That's why I've got powers. But I'm also related to two of the most dangerous and hated mutants in the world.

[See why he didn't want to be overheard?]