1.   His lips twisted mockingly.

2.   Silver-edged lips twisted slightly, and opened.

3.   Her lips twisted and she gave a croaking laugh.

4.   His lips twisted in a smile that was halfway between pain and sorrow.

5.   A sardonic lip twisted upwards.

6.   Her lips twisted into a bitter smile.

7.   Lips twisting, she picked up her comb and began to pull it through her hair.

8.   His lips twist in annoyance.