The baby must have grown a lot since he saw it." "Yes," said Mother.
"I wonder whether Father will think I'VE grown," Phyllis went on, skipping still more gaily.

"I have grown already, haven't I, Mother ?" "Yes," said Mother, "oh, yes," and Bobbie and Peter felt her hands tighten on their arms.
"Poor old Mammy, you ARE tired," said Peter.
Bobbie said, "Come on, Phil; I'll race you to the gate." And she started the race, though she hated doing it.

YOU know why Bobbie did that.

Mother only thought that Bobbie was tired of walking slowly.
Even Mothers, who love you better than anyone else ever will, don't always understand..