She was silent for so long he felt moved to break the mood.
It seemed kind of a shame to break the mood.
She teased him, feeling the need to break the mood.
He sat up, swung his legs over the side of the bed, determined to break the mood.
Mark was silent, not daring to say a word that might break the mood.
He broke the mood by getting us both more coffee.
Carefully, afraid to make the wrong move and break the mood for both of them, she touched her mouth to his.
More practically, what could she now do to break the mood of tension?
It broke the mood, and he let go, stepping back.
For a moment it helped to break the somber mood.