Reira is confused by the statement admittedly- and it shows, in how she looks up at Egon. As far as she had been aware after all, there hadn't been a lot on her plate until...well, Felfri itself.

And just like that, Felfri was over after all.

...And of course she's going to be at least a little suspicious from there. "...How?" she asks- the only thing she manages to get out. How would he do it, if he wants to help?