surprise and confuse
I don't know why she has come to the party without her husband, but I don't want to fluster her by asking.
Fluster reminds me of 'Frustrate'. when you get confused, you get frustrated. Fluster == Find in a Cluster. When someone asks you to find something in an untidy cluster of things you get all confused. f (fall of)+ luster (shine or light). ven i walked on ramp for d frst time. d luster made me nervous nd i became confused about ma moves.