Well, that's an unusual reaction. Stage fright she'd understand, but from how embarrassed Asriel is acting about this you'd think she was encouraging him to do something indecent like-

Corrin suddenly remembers where they are. Oh. Oh! Ooooooooooooh.

After a moment's confusion, Corrin starts laughing. "Oh, gods Asriel, I'm sorry! I didn't mean-we're trying out for a play!" She manages. "S-Sorry, I didn't mean to give you the wrong impression! Mr. Kuja's holding auditions for a...a performance he wants to put on here. There was something about it over the MogNet, I thought maybe you'd seen it."