Cass was watching through a window on the top floor of the manor for the first glimpse of Dick's motorcycle in the distance. As soon as it appeared, she sprinted downstairs to the drawing room, notifying everyone there that "Brother!" was here.
The minutes leading up to his entrance were torture. Here she was, surrounded by so many cookies she was getting a sugar high just looking at them, and she was forced to be still. Quiet she could do, but patient in the face of all this food was asking a bit much.
She kept glancing at Bruce, now? written all over her face. She knew very well that the answer would be no until after Dick showed up and they'd all yelled surprise, but she couldn't help it.
Once he and Alfred finally entered the drawing room, she yelled, "Surprise!" loudest of all and leaped at Dick, giving him one of her patented Cass Hugs. She'd even ninja-swiped three cookies in mid-leap, and she stuffed one into her mouth as she hugged him.