To face the music


to admit error and accept reprimand or punishment as a consequence for having failed or having done something wrong; to willingly experience an unpleasant situation out of a sense of duty or obligation; as, as soon as he broke the window with the football, Billy knew he would have to face the music.- Shak.
to meet any disagreeable necessity, such as a reprimand for an error or misdeed, without flinching.

See also: Face, Music