Jack's mother got angry at Jack because he exchanged her cow for beans.
"And now off with you to bed. Not a sup shall you drink, and not a bit shall you swallow this very night." So Jack went upstairs to his little room in the attic, and sad and sorry he was, to be sure, as much for his mother's sake, as for the loss of his supper.
This content is from "Jack and the beanstalk" in English fairy tales.
I couldn't understand this sentence "as much for his mother's sake, as for the loss of his supper". Could you teach me?