sheepishly

to make an expression of the face in which the corners of the mouth turn up, in a shy or embarrassed way

to give a wide, slightly embarrassed smile

to make a sound of amusement in a shy or embarrassed way

to raise and then lower your shoulders to show that you do not know or care about something, in a shy way

to give a response in an embarrassed or shy manner

to give a response in an embarrassed or shy manner

to say sorry in an embarrassed way

to speak in an embarrassed or shy way

to speak in a low, quiet, and embarrassed voice