Flabbergastedly

She returned my stare and said, "Irene likes him, and that is more to the point." I shook my head flabbergastedly.

I didn't care that Mum was flabbergastedly uttering a very great number of Sophie Margaret Catriona Seades.

to which I could only flabbergastedly say that whoever was doing the throwing must've had a heck of an arm, because the lake was about five miles away, which made them laugh.