1.   A slight smile curved her mouth, relaxing the rigidity of her body.

2.   A smile curved her lips.

3.   As I moved, a small, provocative smile curved her lips.

4.   A faint smile curved his lips.

5.   A smile curved along the sensuous line of that mouth, the most dangerous smile she had ever seen.

6.   A cool smile curved across his lips.

7.   A sly smile curved across her lips.

8.   A taut smile curved across his mouth.

9.   An admiring smile curved his lips as he rested back against the boulder and closed his eyes.

10.   A hard smile curved his mouth.