Sentence:  `` - had enough brains to call ya up so as ya could do sompin about it when the parents - I coulda let her go go '' - His eyes were lowered , so he could n't have seen the narrow , pointed face of his companion suddenly <WSD>writhe</WSD> with fury ; but he was aware of it just the same . 
Meaning of the word marked with <WSD> tags:  to move in a twisting or contorted motion, (especially when struggling)