"You are his family," Max argued, his jaw tightening.

For no reason that she could determine, Robin felt her jaw tightening.

"I see," answered the captain, his jaw tightening.

The captain could feel the muscles in his jaw tightening, but he stayed outwardly calm.

"My God," Julian said, the muscles of his jaw tightening.

"I also have standing orders not to split the fleet," said Vorpatril, his jaw tightening.

Then he thought of Balak, and he felt his jaw tightening.

Stupid girl, I thought, my jaw tightening.

After that, if Valerie did bring up the subject of marriage or kids even tangentially, she could sense Jay's jaw tightening.

Siggar swayed but recovered, eyes blazing and jaw tightening.